using System;
using System.Collections.Generic;
using System.Linq;
using System.IO;
//using System.Text;
//using System.Text.RegularExpressions;
//using System.Globalization;
//using System.Diagnostics;
using static System.Console;
//using System.Numerics;
//using static System.Math;
class Program
{
    static void Main()
    {
        SetOut(new StreamWriter(OpenStandardOutput()) { AutoFlush = false });
        new Program().solve();
        Out.Flush();
    }
    //Scanner cin = new Scanner();
    readonly int[] dd = { 0, 1, 0, -1, 0 }; //→↓←↑
    readonly int mod = 1000000007;


    void solve()
    {
        var c = '?';
        int N = int.Parse(ReadLine());
        for (int i = 0; Math.Abs(i.CompareTo(N)) != i.CompareTo(N); i++)
        {
            var A = Array.ConvertAll(ReadLine().Split(), int.Parse);
            int a = A[0];
            int b = A[1];
            if (a.Equals(b))
            {
                WriteLine("=");
            }
            else if (Math.Abs(a.CompareTo(b)) == a.CompareTo(b))
            {
                WriteLine((char)(c - 1));
            }
            else
            {
                WriteLine((char)(c - 3));
            }
        }
        //WriteLine((char)(c + 1));
    }

}