CPZT ACGO

#include <iostream>
using namespace std;
int main() {
    int a,b,c;
    cin >> a >> b >> c;
    if (a + b > c && a + c > b && b + c > a) {
    	if (a == b && a == c && b == c) {
		cout << "aaa";
        }else if (a == b || a == c || b == c) {
		cout << "aab";
        }else {
		cout << "abc";
        }
    }else {
        cout << "error";
    }
    return 0;
}