#include "bits/stdc++.h"
using namespace std;
#define print(x) cout<<x<<endl;
#define rep(i,a,b) for(int i=a;i<b;i++)
#define REP(i,a) for(int i=0;i<a;i++)
#define printall(n,array) {for(int i=0;i<n;i++){cout<<array[i]<<" ";}cout<<endl;}
#define U() cout<<endl;
typedef long long ll;
typedef pair<int, int> PI;
typedef pair<int, PI> V;
typedef vector<int> VE;
const ll mod = 1000000007; //10^9+7
 
int main(){
  int a;
  cin >> a;
  int h, m;
  h = a / 100;
  m = (a - (a / 100) * 100) * 6 / 10;
  if(m > 10){
    print(h + 10 << ":" << m);
  }else{
    print(h + 10 << ":0" << m);
  }
}