N = int(input())
a = [0] * N
b = [0] * N

for i in range(N):
	a[i],b[i] = map(int,input().split())

for i in range(N):
	if a[i] == b[i]:
		print("=")
	elif str(a[i] - b[i]).isdigit() == True:
		print(chr(0x3e))
	else:
		print(chr(0x3c))