#include <iostream>
using namespace std;
long long T, s;

int main() {
	cin >> T;
	for (int i = 1; i <= T; i++) {
		cin >> s;
		if (s == 0) {
			cout << "E" << endl;
		} else if (s % 10 == 0) {
			cout << "E" << endl;
		} else {
			cout << "B" << endl;
		}
	}

	return 0;
}