C1111233131211111211113313331333133313331122233133313232313233233231   >>    C111123313121111121111331333133313331333112223313331323231323323323   <<    C1111233131211111211113313331333133313331122233133313232313233233233   >>      C1111233131211111211113313331333133313331122233133313232313233233232   >>