while True:

 try:

  a,b=map(int,input().split())

  if (a%b==0 and b!=0) or (a==0 and b==0):

   print("Ok!")

  else:

   print("Impossib1e!")

 except:

  break

 

  if (a%b==0 and b!=0) or (a==0 and b==0):

 

a%b==0和b!=0交換順序，你這樣寫如果b是0會出現除以0的錯誤