#include <iostream>
#include <stdio.h>
#include <string>
#include <cstring>

#include <string.h>
#include <algorithm>
#include <cmath>
#include <math.h>
#include <cstdio>
using namespace std;
#define PI acos(-1,0)
#define eps 1e-10
#define ll long long
#define mst(ss,b) memset((ss),(b),sizeof(ss))

int main()
{
    ll  a;
    cin>>a;
    cout<<"ABC"<<a<<endl;
    return 0;
}