/**
 *  author:   TakeruOkuyama
 *  created:  2020-04-09 14:53:46
**/
#include <bits/stdc++.h>
#define rep(i, n) for(int i = 0; i < (n); i++)
using namespace std;
using ll = long long;
using P = pair<int, int>;

const int MOD = 1000000007;

int main(){
    int a;
    cin >> a;
    int h = 10 + a / 60;
    int m = ((a % 100)/10)*6;
    if(to_string(m).size() == 1){
        cout << 10 + a / 100 << ":" << 0 << ((a % 100)/10)*6;
    }else{
        cout << 10 + a / 100 << ":" << ((a % 100)/10)*6 << endl;
    }
return 0;}

/**
 * g++ code.cpp
 * ./a.out
 * shift + ctrl + i
**/