C11111333133313232233133313331333133112111112113313231333131232322122321   >>    C1111133313331323223313331333133313311211111211331323133313123232212232   <<    C11111333133313232233133313331333133112111112113313231333131232322122323   >>      C11111333133313232233133313331333133112111112113313231333131232322122322   >>