C12313211232233312111111312111133133313331323133313332322331212222121131   >>    C1231321123223331211111131211113313331333132313331333232233121222212113   <<    C12313211232233312111111312111133133313331323133313332322331212222121133   >>      C12313211232233312111111312111133133313331323133313332322331212222121132   >>