fun main(args: Array<String>) {
    p296()
}

fun p296() {
    val (n, h, m, interval) = readLine()!!.split(' ').map { it.toInt() }

    val add = interval * (n - 1)
    val newH = (h + (add / 60)) % 24
    val newM = (m + (add % 60)) % 60

    val answer = buildString {
        appendln(newH)
        append(newM)
    }

    println(answer)
}