#include<iostream>
#include<cstdio>
#include<cstring>
#include<cstdlib>
#include<cmath>
#include<algorithm>

#define ll long long
using namespace std;

int main()
{
	ios::sync_with_stdio(false);
	int m;
	cin>>m;
	cout<<"ABC"<<m<<endl;
	
	
return 0;
}
