#include <bits/stdc++.h>
using namespace std;
int main(){
	int i2,h=0,m=0,s=0;
	cin>>i2;
		s++;
		if(s==60)m=m+s/60,s=s%60;
		if(m==60)h=h+s/60,m=m%60;
		if(h<10)cout<<0;
		cout<<h<<":";
		if(m<10)cout<<0;
		cout<<m<<":";
		if(s<10)cout<<0;
		cout<<s<<"\n";
	return 0;
}

/**************************************************************
	Problem: 1081
	User: zhouhongyi
	Language: C++
	Result: Wrong Answer
****************************************************************/