function examTime([hoursE, minE, hoursA, minA]) {

    [hoursE, minE, hoursA, minA] = [hoursE, minE, hoursA, minA].map(x => parseInt(x));
    let totalMinE = (hoursE * 60) + minE;
    let totalMinA = hoursA  * 60 + minA;
    let time = totalMinE - totalMinA;
    let h = parseInt(Math.abs(time) / 60);
    let min = parseInt(Math.abs(time) % 60);

    if (time < 0 && h <= 0) {

        console.log("Late");
        console.log(`${min} minutes after the start`);
    }
    else if (time < 0 && h >= 0 && min < 10) {
        console.log("Late");
        console.log(`${h}:0${min} hours after the start`);
    }
    else if (time < 0 && h >= 0 && min > 10) {
        console.log("Late");
        console.log(`${h}:${min} hours after the start`);
    }
    else if (time == 0)
        console.log("On time");
    else if (time <= 30 ) {
        console.log("On time");
        console.log(`${min} minutes before the start `)
    }

    else if (time > 30 && h <= 0 ) {
        console.log("Early");
        console.log(`${min} minutes before the start`);

    }

    else if (time > 30 && h > 0 && min>=10) {
        console.log("Early");
        console.log(`${h}:${min} hours before the start`);

    }
    else if (time > 30 && h > 0 && min < 10) {
        console.log("Early");
        console.log(`${h}:0${min} hours before the start`);

    }
}