C12313211232233312111111312111133133313331323133313333232233312212233231   >>    C1231321123223331211111131211113313331333132313331333323223331221223323   <<    C12313211232233312111111312111133133313331323133313333232233312212233233   >>      C12313211232233312111111312111133133313331323133313333232233312212233232   >>