```html
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">

<title>Minimal pairs - vowel sounds in British English: "coat" and "cot"</title>
<meta name="description" content="Listening discrimination practice contrasting /əʊ/ and /ɒ/ in British English.">
<meta name="keywords" content="British English,pronunciation,phonology,phonemes,vowel sounds,minimal pairs,listening discrimination,language learning,teaching,efl,esl,elt">

<style>
@page {
    size: A4;
    margin: 20mm;
}

* {
    box-sizing: border-box;
}

html, body {
    margin: 0;
    padding: 0;
}

body {
    background: #e5e5e5;
    color: #222;
    font-family: Arial, Helvetica, sans-serif;
    font-size: 17px;
    line-height: 1.6;
}

.page {
    width: 210mm;
    min-height: 297mm;
    margin: 15mm auto;
    padding: 20mm 25mm;
    background: white;
    box-shadow: 0 0 10px rgba(0,0,0,.22);
}

.screen-nav {
    margin: 0 0 20px;
    padding: 8px 0;
    text-align: center;
    font-size: 14px;
    border-bottom: 1px solid #ddd;
}

.screen-nav a {
    color: #245a8d;
    text-decoration: none;
    margin: 0 6px;
}

.screen-nav a:hover,
.screen-nav a:focus {
    text-decoration: underline;
}

h1 {
    margin: 0 0 24px;
    text-align: center;
    font-size: 21px;
    line-height: 1.3;
    font-weight: 600;
}

.introduction {
    margin: 0 auto 22px;
    text-align: center;
}

.phoneme {
    font-family: "Lucida Sans Unicode", "Arial Unicode MS", Arial, sans-serif;
}

.examples {
    max-width: 600px;
    margin: 0 auto 30px;
    text-align: center;
}

.examples-title {
    margin-bottom: 12px;
    font-weight: bold;
}

.example-row {
    display: flex;
    justify-content: center;
    gap: 30px;
    margin: 10px auto;
}

.example-item {
    width: 150px;
    text-align: center;
}

.example-word {
    display: block;
    margin-bottom: 7px;
    font-size: 18px;
    font-weight: bold;
}

.listen-button {
    padding: 7px 13px;
    font-family: Arial, Helvetica, sans-serif;
    font-size: 14px;
    cursor: pointer;
}

.exercise {
    max-width: 600px;
    margin: 0 auto;
    text-align: center;
}

.question-number {
    margin-bottom: 8px;
    font-size: 18px;
    font-weight: bold;
}

.question-instruction {
    margin: 0 0 18px;
}

.question-listen {
    margin: 18px auto 24px;
    text-align: center;
}

.question-listen .listen-button {
    min-width: 150px;
    padding: 9px 18px;
    font-size: 15px;
}

.answer-buttons {
    display: flex;
    justify-content: center;
    gap: 30px;
    margin: 20px auto;
}

.answer-buttons button {
    width: 150px;
    padding: 10px 15px;
    font-family: Arial, Helvetica, sans-serif;
    font-size: 17px;
    cursor: pointer;
}

.feedback {
    min-height: 30px;
    margin: 20px auto;
    font-weight: bold;
}

.next-button {
    display: none;
    margin: 18px auto;
    padding: 8px 16px;
    font-family: Arial, Helvetica, sans-serif;
    font-size: 14px;
    cursor: pointer;
}

.score {
    display: none;
    margin: 30px auto;
    text-align: center;
    font-size: 19px;
    font-weight: bold;
}

.restart-button {
    display: none;
    margin: 15px auto;
    padding: 8px 16px;
    font-family: Arial, Helvetica, sans-serif;
    font-size: 14px;
    cursor: pointer;
}

.instruction {
    margin: 28px auto 0;
    max-width: 650px;
    text-align: center;
}
.footer {
    margin-top: 24px;
    text-align: center;
    font-size: 13px;
}

@media (max-width: 800px) {
    body {
        background: white;
    }

    .page {
        width: 94%;
        min-height: auto;
        margin: 20px auto;
        padding: 24px 28px;
        box-shadow: none;
    }

    .example-row,
    .answer-buttons {
        gap: 12px;
    }

    .example-item,
    .answer-buttons button {
        width: 135px;
    }
}

@media print {
    body {
        background: white;
        font-size: 12pt;
    }

    .page {
        width: 100%;
        min-height: 0;
        margin: 0;
        padding: 0;
        box-shadow: none;
    }

    .screen-nav,
    .examples,
    .exercise,
    .score,
    .restart-button,
h1 {
        font-size: 18pt;
    }

    .footer {
        font-size: 9pt;
    }
}

.next-exercise {
    margin: 28px auto 0;
    padding-top: 18px;
    border-top: 1px solid #ddd;
    text-align: center;
    font-size: 15px;
}

.next-exercise a {
    color: #245a8d;
    text-decoration: none;
}

.next-exercise a:hover,
.next-exercise a:focus {
    text-decoration: underline;
}

@media print {
    .next-exercise {
        display: none;
    }
}
</style>
</head>

<body>

<div class="page">

    <div class="screen-nav">
    <a href="minimal-exercises.html">Minimal Pairs: Listening exercises</a> |<a href="minimal.html">Minimal Pairs</a> |
        <a href="phono.html">L1 pronunciation problems</a> |
        <a href="index.html">Home</a>
    </div>

    <h1>
        Minimal Pairs –
        <span class="phoneme">/&#601;&#650;/</span>
        and
        <span class="phoneme">/&#594;/</span>
    </h1>

    <p class="introduction">
        <span class="phoneme">/&#601;&#650;/</span> as in <strong>"coat"</strong>
        &nbsp; · &nbsp;
        <span class="phoneme">/&#594;/</span> as in <strong>"cot"</strong>
    </p>

    <!-- EXAMPLES -->

    <div class="examples">

        <div class="examples-title">Examples</div>

        <div class="example-row">

            <div class="example-item">
                <span class="example-word">coat</span>
                <button class="listen-button"
                        type="button"
                        onclick="speak('coat')">
                    🔊 Listen
                </button>
            </div>

            <div class="example-item">
                <span class="example-word">cot</span>
                <button class="listen-button"
                        type="button"
                        onclick="speak('cot')">
                    🔊 Listen
                </button>
            </div>

        </div>

        <p>
            Listen to the examples and notice the difference between
            <span class="phoneme">/&#601;&#650;/</span> and
            <span class="phoneme">/&#594;/</span>.
        </p>

    </div>

    <!-- ONE QUESTION AT A TIME -->

    <div class="exercise">

        <div class="question-number" id="questionNumber"></div>

        <p class="question-instruction">
            Listen to the word. Then choose the word you hear.
        </p>

        <!-- ONLY ONE LISTEN BUTTON -->

        <div class="question-listen">
            <button class="listen-button"
                    id="listenButton"
                    type="button">
                🔊 Listen
            </button>
        </div>

        <!-- TWO ANSWERS SIDE BY SIDE -->

        <div class="answer-buttons">

            <button id="answerA" type="button"></button>

            <button id="answerB" type="button"></button>

        </div>

        <div class="feedback" id="feedback"></div>

        <button class="next-button"
                id="nextButton"
                type="button">
            Next question
        </button>

    </div>

    <div class="score" id="score"></div>

    <button class="restart-button"
            id="restartButton"
            type="button">
        Try again
    </button>

    <p class="instruction">
        Listen carefully to the vowel sounds and concentrate on the difference
        between the two words.
    </p>

    <div class="footer">
        Minimal pairs listening discrimination – British English vowel contrast
    </div>
<div class="next-exercise">
    <a href="minimal1920i.html">
        Next exercise: Listening discrimination – /əʊ/ and /aʊ/ – load and loud →
    </a>
</div>

</div>

<script>

const questions = [
    ["coat", "cot"],
    ["code", "cod"],
    ["rote", "rot"],
    ["dote", "dot"],
    ["bloke", "block"],
    ["shown", "shone"],
    ["cope", "cop"],
    ["hope", "hop"],
    ["note", "not"],
    ["goat", "got"],
    ["road", "rod"],
    ["cloak", "clock"],
    ["smoke", "smock"],
    ["dole", "doll"],
    ["mope", "mop"],
    ["Pope", "pop"],
    ["goad", "God"],
    ["soak", "sock"],
    ["cope", "cop"],
    ["sowed", "sod"]
];

let currentQuestion = 0;
let score = 0;
let heardWord = "";
let answered = false;


/* TEXT-TO-SPEECH */

function speak(word) {

    if (!("speechSynthesis" in window)) {
        alert("Speech synthesis is not available in this browser.");
        return;
    }

    window.speechSynthesis.cancel();

    const utterance = new SpeechSynthesisUtterance(word);

    utterance.lang = "en-GB";
    utterance.rate = 0.82;
    utterance.pitch = 1;

    window.speechSynthesis.speak(utterance);
}


/* LOAD QUESTION */

function loadQuestion() {

    answered = false;

    const pair = questions[currentQuestion];

    /*
       The word heard is randomly selected.
       The answer buttons are also randomly ordered.
    */

    heardWord = pair[Math.floor(Math.random() * 2)];

    let answers = [pair[0], pair[1]];

    if (Math.random() < 0.5) {
        answers.reverse();
    }

    document.getElementById("questionNumber").textContent =
        "Question " + (currentQuestion + 1) +
        " of " + questions.length;

    document.getElementById("answerA").textContent = answers[0];
    document.getElementById("answerB").textContent = answers[1];

    document.getElementById("feedback").textContent = "";

    document.getElementById("nextButton").style.display = "none";

    document.getElementById("answerA").disabled = false;
    document.getElementById("answerB").disabled = false;
}


/* ONE LISTEN BUTTON */

document.getElementById("listenButton").addEventListener("click", function() {

    speak(heardWord);

});


/* ANSWER BUTTONS */

document.getElementById("answerA").addEventListener("click", function() {

    checkAnswer(this.textContent);

});

document.getElementById("answerB").addEventListener("click", function() {

    checkAnswer(this.textContent);

});


/* CHECK ANSWER */

function checkAnswer(answer) {

    if (answered) {
        return;
    }

    answered = true;

    document.getElementById("answerA").disabled = true;
    document.getElementById("answerB").disabled = true;

    const feedback = document.getElementById("feedback");

    if (answer === heardWord) {

        score++;

        feedback.textContent =
            "Correct! You heard \"" + heardWord + "\".";

    } else {

        feedback.textContent =
            "Not quite. The word was \"" + heardWord + "\".";

    }

    if (currentQuestion < questions.length - 1) {

        document.getElementById("nextButton").style.display =
            "inline-block";

    } else {

        showScore();

    }

}


/* NEXT QUESTION */

document.getElementById("nextButton").addEventListener("click", function() {

    currentQuestion++;

    loadQuestion();

});


/* FINAL SCORE */

function showScore() {

    const percentage =
        Math.round((score / questions.length) * 100);

    document.getElementById("score").style.display =
        "block";

    document.getElementById("score").textContent =
        "Your score: " +
        score + " out of " +
        questions.length +
        " (" + percentage + "%)";

    document.getElementById("restartButton").style.display =
        "inline-block";

}


/* RESTART */

document.getElementById("restartButton").addEventListener("click", function() {

    currentQuestion = 0;
    score = 0;

    document.getElementById("score").style.display =
        "none";

    document.getElementById("restartButton").style.display =
        "none";

    loadQuestion();

});


/* START */

loadQuestion();

</script>

</body>
</html>
```