#include<bits/stdc++.h>
using namespace std;
int main(){
    int i=6,j[i],n,k;
    cin>>n;
    for(i=0;i<=5;i++)
        j[i]=0;
    i=6;
    while(n!=0){
        if(n%60<10){
            j[i-1]=n;
            j[i-2]=0;   
        }
        else{
            j[i-1]=n%60%10;
            j[i-2]=n%60/10;
        }
        i-=2;
        n/=60;
    }
    for(i=0;i<=5;i++){
        cout<<j[i];
        if((i+1)%2==0&&i!=5)
        cout<<":";
    }
    return 0;
}
/**************************************************************
	Problem: 1081
	User: fuyijun
	Language: C++
	Result: Accepted
	Time:7 ms
	Memory:2072 kb
****************************************************************/