#include <iostream>

using namespace std;

int f(int n)
{
	int sum = 0;
	int last = 0;
	int divisor = 2;
	while (n != 1){
		if (n % divisor == 0){
			if (last != divisor){
				sum += (last = divisor);
			}
			n /= divisor;
		} else {
			++divisor;
		}
	}
	return 2 * last - sum;
}

int main()
{
	for (int a, b; cin >> a >> b && a && b;){
		cout << ((f(a) > f(b)) ? "a" : "b") << endl;
	}
}