Jacana Number

This problem is very simple problem.
We define J(n,k) like this:
1. J(n,1)=n
2. J(n,k)=$n^{J(n,k-1)}$ (k=2,3,…)
We call this number “Jacana Number”.
In this problem you are given two jacana numbers and you must output which Jacana Number is greater than the other.

The first line contains an integer T (1 <= T <= 10000), the number of test cases.
Each test case contains four integers n, a, m, b (1 <= n, a, m, b <= $10^9$)

For each test case output one of (‘>’, ‘=’, ‘<’) in one line.
If J(n,a)> J(m,b), output ‘>’.
If J(n,a)= J(m,b), output ‘=’.
If J(n,a)< J(m,b), output ‘<’.

3
2 2 3 1
2 3 3 2
1 2 1 4

>
<
=

2017 Multi-University Training Contest - Team 10