C11111333133313232233133313331333133112111112113313221211113313221   >>    C1111133313331323223313331333133313311211111211331322121111331322   <<    C11111333133313232233133313331333133112111112113313221211113313223   >>      C11111333133313232233133313331333133112111112113313221211113313222   >>