C12313211232233312111111312111133133313331323133313332221331212122321322131   >>    C1231321123223331211111131211113313331333132313331333222133121212232132213   <<    C12313211232233312111111312111133133313331323133313332221331212122321322133   >>      C12313211232233312111111312111133133313331323133313332221331212122321322132   >>