function solve(input) {


let hrExam = Number(input[0]);

let minExam = Number(input[1]);

let hrArrival = Number(input[2]);

let minArrival = Number(input[3]);


let hourDifference = hrExam - hrArrival;

let minDifference = minExam - minArrival;


hourDifference = Math.abs(hourDifference);

minDifference = Math.abs(minDifference);

let difference = 60 - minDifference;






// ON TIME

if ((hrExam >= hrArrival && difference <= 30 || hourDifference === minDifference) && (difference <= 30 || difference === 60) || (minArrival < minExam && minDifference <= 30 && hourDifference === 0)) {



 if (minDifference > 0 && difference <= 30) {

    console.log(`On time`);
    console.log(`${difference} minutes before the start`);

 } else if (hourDifference === 0 && minDifference === 0) {

    console.log(`On time`);

 }  else {

    console.log(`On time`);
    console.log(`${minDifference} minutes before the start`);


 }


}




// LATE


if ((hrExam <= hrArrival && hourDifference !== minDifference && minArrival > minExam) || (difference > 30 && difference !== 60 && hrExam <= hrArrival && minArrival > minExam) || (hrExam < hrArrival && minArrival < minExam) || hrArrival > hrExam) {


if (hrExam === hrArrival) {

    console.log(`Late`);
    console.log(`${minDifference} minutes after the start`);

} else if (hrExam < hrArrival && difference <= 30) {


    if (minDifference > 9) {

    console.log(`Late`);
    console.log(`${hourDifference}:${minDifference} hours after the start`);

    } else {

    console.log(`Late`);
    console.log(`${hourDifference}:0${minDifference} hours after the start`);

    }


} else if (difference > 30 && hrExam < hrArrival && difference !== 60 && minArrival < minExam) {

    console.log(`Late`);
    console.log(`${difference} minutes after the start`);

} else {

    if (minDifference > 9) {

        console.log(`Late`);
        console.log(`${hourDifference}:${minDifference} hours after the start`);

        } else {

        console.log(`Late`);
        console.log(`${hourDifference}:0${minDifference} hours after the start`);

        }


}


}




// EARLY


if ((difference > 30 && hrExam >= hrArrival && minDifference > 30) || (minArrival < minExam && minDifference > 30) || (hrExam > hrArrival && minArrival > minExam && minDifference > 30 && difference > 30) || (difference === 60 && hrExam >= hrArrival && minDifference > 0) || (hourDifference >= 1 && hrExam >= hrArrival && difference > 30)) {


    if (minDifference <= 30 && difference < 60 && hourDifference <= 1 && minArrival > minExam) {

    console.log(`Early`);

    console.log(`${difference} minutes before the start`);

    } else if (minDifference <= 30 && difference < 60 && hourDifference <= 1 && minArrival < minExam)  {

        console.log(`Early`);

        console.log(`${minDifference} minutes before the start`);


    } else {

        if (minDifference < 10) {

        console.log(`Early`);

        console.log(`${hourDifference}:0${minDifference} hours before the start`);


    } else {

        console.log(`Early`);

        console.log(`${hourDifference}:${minDifference} hours before the start`);

    }

    }


}




}

solve([

    '9',
    '30',
    '9',
    '50'

]);