/*
 *     Date:
 *        2015/07/04
 *     Author:
 *        _Rover
 */
#include <cmath>
#include <cstdio>
#include <string>
#include <cstring>
#include <iostream>
#include <algorithm>
using namespace std;

int n, ss, mm, tt, degt, degs, tmp;
int main(){
//    freopen( "" , "r" , stdin );
//    freopen( "" , "w" , stdout );
    while( scanf( "%d" , &n ) != EOF ){
        for( tt = 0 ; tt < 12 ; tt ++ )
            for( ss = 0 ; ss < 60 ; ss ++ )
                for( mm = 0 ; mm < 60 ; mm += 10 ){
                    degt = tt * 30 * 12000 + ss * 200 * 30 + 
                        mm * 100;
                    degs = ss * 6 * 12000 + mm * 1200;
                    tmp = degs - degt;
                    if( tmp < 0 ) tmp = - tmp;
                    if( tmp > 2160000 ) tmp = 2160000*2-tmp;
                    if( tmp == n ){
                        printf( "%02d:%02d:%02d\n" , tt , ss , mm );
                    }
                }        
    }
    
    
    
    return 0;
}