C12313211232233312111111312111133133313331323133323132323322212233223331   >>    C1231321123223331211111131211113313331333132313332313232332221223322333   <<    C12313211232233312111111312111133133313331323133323132323322212233223333   >>      C12313211232233312111111312111133133313331323133323132323322212233223332   >>