C12313211232233312111111312111133133313331323133313332322331212222123313332131   >>    C1231321123223331211111131211113313331333132313331333232233121222212331333213   <<    C12313211232233312111111312111133133313331323133313332322331212222123313332133   >>      C12313211232233312111111312111133133313331323133313332322331212222123313332132   >>