Help me in solving PMD7 problem

help
1

My issues
the below code has passed the sample test case and i have also tried different cases and it gave me correct output
but still after submitting the code it is saying WRONG ANSWER

MY CODE

cook your dish here

import math
t=int(input())
for i in range(t):
x,m=map(int, input().split())
digit=0
combine = 0
while x>0:
digit=x%10
s = math.pow(digit,m)
mod = s % 10
combine = combine * 10 + mod
x = x//10

if combine%7==0:
    print("YES")
else:
    print("NO")