#include "bits/stdc++.h"
using namespace std;
using ll=long long;

signed main() {
  int n;
	__builtin_scanf("%d", &n);
  char c = char(60);
  while (n--) {
		int a, b;
		__builtin_scanf("%d %d", &a, &b);
    if (!(a/b)) printf("%c\n", c);
    else if (!(b/a)) printf("%c\n", c+2);
    else printf("%c\n", c+1);
  }
}