Rohit was doing the work of his math class about three days but he is tired of make operations a lot and he should deliver his task tomorrow. His math’s teacher gives two numbers a and b. The problem consist in find the last digit of the potency of base a and index b. Help Rohit with his problem. You are given two integer numbers: the base a (number of digits d, such that 1 ≤ d ≤ 1000) and the index b (0 ≤ b ≤ 922*10^15). You
have to find the last digit of a^b.

Input

The first line of input contains an integer t, the number of test cases (t ≤ 30). t test cases follow. For each test case will appear a and b separated by space.

Output

For each test case output an integer per line representing the result.

SAMPLE INPUT
3
3 10
6 2
150 53

SAMPLE OUTPUT
9
6
0
t = input()	
l = []
for i in range(0, t):
	k = raw_input().split()
	m = int(k[0])
	n = int(k[1])
	z = m
	for j in range(1, n):
		z = z * m
		if z > 10:
			z = z % 10
	l.append(z)
for item in l:
	print item