#include<bits/stdc++.h>
#define rep(i,a,n) for (int i = a;i < n;i++)
#define per(i,n,a) for (int i = n-1;i >= a;i--)
using namespace std;

int main() {
    int p;
    cin >> p;
    printf("%02d:%02d\n", 10 + p / 100, (p % 100) * 60 / 100);
}