C12313211232233312111111312111133133313331323133313332221331212223321321   >>    C1231321123223331211111131211113313331333132313331333222133121222332132   <<    C12313211232233312111111312111133133313331323133313332221331212223321323   >>      C12313211232233312111111312111133133313331323133313332221331212223321322   >>