#include<vector>
#include<iostream>
#include<string>
#include<algorithm>
#include<math.h>
#include<map>
#include<functional>
#include<queue>
#include<stack>
#include<string.h>
#include<list>
#define MOD 10000
#define INF 1000000000
#define MAX 101
using namespace std;
typedef long long int ll;
typedef pair<int,int> P;
int main() {
    int a;
    cin>>a;
    a/=10;
    cout<<10+a/10;
    cout<<":";
    if(a%10==0){
        cout<<"00"<<endl;
    }
    else if((a%10)==1){
        cout<<"06"<<endl;
    }else{
        cout<<6*(a%10)<<endl;
    }
}