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  1. t=int(input())
  2. for tt in range(t):
  3. ss=raw_input()
  4. s=ss.split(' ')
  5. a=int(s[0])
  6. x=a%10
  7. b=int(s[1])
  8. if b%4==0:
  9. print(x**4)%10
  10. else:
  11. print(x**(b%4))%10
Success #stdin #stdout 0.08s 10904KB
stdin
2
3 10
6 2
stdout
9
6