#include<bits/stdc++.h>
using namespace std;

int main()
{
    int n, h, m,x=1;
    cin>>n;
    h=n/60;
    m=n%60;

    while (n>=720 && n<=1439)
    {
       h=h-12;
    }
    /* */
    for(int i=1; i<=x; i++)
    {
        cout<<h<<":"<<m<<"PM";
    }
}