#include <iostream>
#include <algorithm>
#include <cmath>
#include <vector>
#include <string>
#include <iomanip>
#include <string.h>
#include <algorithm>
//#include <bits/stdc++.h>
#include    <vector>
#define INF 999999999
# include <cstdio>
# include <cstdlib>
using namespace std;
#define ll long long
#define boost ios_base::sync_with_stdio(false); cin.tie(0); cout.tie(0)

int main(){
    int n;
    cin >>n;
    cout<<"ABC"<<n<<endl;

    return 0;
}
