@ -1 +1 @@
print(set(s:=sorted(map(lambda x:int(''.join(map(lambda y:'01'[int(y in'BR')],x)),2)//2, open(0))))^set(range(s[0],s[-1]+1)))
print(set(s:=sorted(map(lambda x:int(''.join(map(lambda y:'01'[int(y in'BR')],x)),2)//2,open(0))))^set(range(s[0],s[-1]+1)))
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