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

int main(int argc, char const* argv[])
{
    int a;
    cin>>a;
    int start,zikan,end,m;
    start = 10;
    zikan = a/100;
    end = start + zikan;
    m = (a%100)*6/10;
    if(m<10){
        cout<<end<<":0"<<m<<endl;
        return 0;
    }
    cout<<end<<":"<<m<<endl;
    return 0;
}