llll lloo loll lolo lool loor loot loro lotl loto lotr lott loul lour lout louu loux lox- loxo lrrr lttr lull lulu lurt luxo lxxx ollo olor olot oltu olur olux oolo oooo oort orlo orlu oro- oror orot orro orto oto- otoo otor otro otto ottu otur oulu oulx our- ouro ourt out- outo ouu- oxo- oxox oxxo roll rolo rolt rool roor root roox roro rort roru rotl roto rotr rott roul rout roux roxo rrrr rtlt rull rulo ruro ruru rutl ruto rutt rutu tltx tol- toll tolo tolt tolu tool toor toot toro torr tort toru torx toto totr tott toul tour tout tox- toxo toxt troo trot trou trox trtr trut truu trux tttt ttul tull tulo tulu tuor turo turr turt turu tutl tuto tutt tutu tuuo tuxl txtr ullo ullr ulo- ulto ultt ulul uor- uro- urol uroo urox urur urut utor utto uttu uulu uuuu uxor uxul xlox xolo xoro xout xoxo xtol xtro xtul xuxu xxxo xxxx