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
import math


table = [0,0,0,0, 1,1,1,1, 6,2,4,8, 1,3,9,7, 6,4,6,4, 
  5,5,5,5, 6,6,6,6, 1,7,9,3, 6,8,4,2, 1,9,1,9]

N = raw_input()
result = []
for t in range(int(N)):
    sint = raw_input()
    n = int(sint.split()[0])
    a = int(sint.split()[1])    
    result.append( table[((n % 10) << 2) + (a % 4)])    

for i in range(len(result)):
    print result[i]