import std.conv, std.stdio, std.string;
import std.math;

void main() {
  readln;
  for (string line; (line = readln) !is null; ) {
    const tokens = line.split;
    const A = tokens[0].to!int;
    const B = tokens[1].to!int;
    writeln(cast(char)(61 + sgn(A - B)));
  }
}