#include <iostream>
using namespace std;
const int TEN = 10;
const int HUNDRED = 100;
int main() {
int a, b, flagA = 0, flagB = 0;
cin >> a >> b;
if (a / TEN == a % HUNDRED && b / TEN == b % TEN) {
flagA = 1;
flagB = 1;
} else if (a / TEN == a % HUNDRED) {
flagA = 1;
} else {
flagB = 1;
}
//cout << flagA << " " << flagB << "\n";
if (flagA == 1 && flagB == 1) {
cout << "ambele";
} else if (flagA == 1) {
cout << "a";
} else {
cout << "b";
}
return 0;
}
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