cccc cccl cccu cclc ccnc ccnu ccuc ckck ckcl ckln cknc clun cucc cuck cucn cuk- culc culk cull kccc kcck kccl kccu kckc kckk kckl kckn kclc kclk kcll kcln kclu kcuk kcul kkck kkcl kkcn kkkk kklc kkll kkln kknn kknu kkuu klcc klck klcl klcn klkc klkk klkl klkn kllc kllk klnc klnn kluk klun kluu knck kncn kncu knkk knlc knnk knuk kucc kukk kukl kukn kuku kull kuln kulu kunc kunk kunu kuuk kuul kuuu lccc llcc lllc llll lnnk luck lull lulu lunk lunn luuk nccc nccn nccu nclc ncln ncnc ncuk nlcc nnnn nuck nucu nuku null nunc nunk nunn nuuk ukcc uknc ulcc uluk ulul uncc uncl unkl unkn uulu uuuu