C12313211232233312111111312111133133313331323133313332322331212221232113322231   >>    C1231321123223331211111131211113313331333132313331333232233121222123211332223   <<    C12313211232233312111111312111133133313331323133313332322331212221232113322233   >>      C12313211232233312111111312111133133313331323133313332322331212221232113322232   >>