313 equals 151 by rolf

while 1:
 a,b=input().split()
 f=1
 for i in range(len(a)-1):
  for j in range(i+1,len(a)):
   if a[i]==a[j] and b[i]!=b[j]:f=0
   if b[i]==b[j] and a[i]!=a[j]:f=0
 if f: print(a,b)

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