C12313211232233312111111312111133133313331323133323132323322211221221   >>    C1231321123223331211111131211113313331333132313332313232332221122122   <<    C12313211232233312111111312111133133313331323133323132323322211221223   >>      C12313211232233312111111312111133133313331323133323132323322211221222   >>