C12313211232233312111111312111133133313331323133313332322331212221121313131   >>    C1231321123223331211111131211113313331333132313331333232233121222112131313   <<    C12313211232233312111111312111133133313331323133313332322331212221121313133   >>      C12313211232233312111111312111133133313331323133313332322331212221121313132   >>