C1111233131211111211113313331333133313331333133313331333133313221232223321   >>    C111123313121111121111331333133313331333133313331333133313331322123222332   <<    C1111233131211111211113313331333133313331333133313331333133313221232223323   >>      C1111233131211111211113313331333133313331333133313331333133313221232223322   >>