C1111233131211111211113313331333133313331122212111112111113232113313232232321   >>    C111123313121111121111331333133313331333112221211111211111323211331323223232   <<    C1111233131211111211113313331333133313331122212111112111113232113313232232323   >>      C1111233131211111211113313331333133313331122212111112111113232113313232232322   >>