垃圾

#include <iostream>
using namespace std;

int main() {
    int a,b,c;
    cin >> a >> b >> c;

    if (a + b <= c or b + c <= a or a + c <= b) {
        cout <<"error";
        exit(0);
    }
    if (a == b && b == c) {
        cout << "aaa";
        exit(0);
    }
    if (((a==b) && b != c) or ((b==c) && b != a) or ((a==c) && c != b)) {
        cout << "aab";
        exit(0);
    }
    if (a != b && b != c && a != c) {
        cout << "abc";
        exit(0);
    }
}