C11111333133313232233133313331333133112323131121211113313223331221   >>    C1111133313331323223313331333133313311232313112121111331322333122   <<    C11111333133313232233133313331333133112323131121211113313223331223   >>      C11111333133313232233133313331333133112323131121211113313223331222   >>