-al a-a a-b a-c aaa aab aac aak aal aar aau ab- aba abb abc abk abl abr abu ac- aca acb acc ack acl acr acu aka akb akc akk akl akr aku al- ala alb alc alk all alr alu ar- ara arb arc ark arl arr aru au- aua aub auc auk aul aur b-u baa bab bac bak bal bar bau bba bbb bbc bbk bbl bbr bbu bca bcb bcc bck bcl bcr bcu bka bkb bkc bkk bkl bkr bla blb blc blk bll blr blu bra brb brk brl brr bru bua bub buc buk bul bur buu c-- caa cab cac cak cal car cau cba cbb cbc cbk cbl cbr cbu cca ccb ccc cck ccl ccr ccu cka ckb ckc cl- cla clb clc clk cll clr clu cra crb crc crk crl crr cru cua cub cuc cuk cul cur cuu ka- kaa kab kac kak kal kar kau kba kbb kbc kbk kbl kbr kbu kca kcb kcc kck kcl kcr kcu kkb kkc kkk kkl kkr kku kl- kla klb klc klr klu kra krc krk krl krr kru kub kuc kuk kul kur kuu la- laa lab lac lak lal lar lau lba lbb lbc lbk lbl lbr lbu lca lcb lcc lck lcl lcr lcu lka lkb lkl lkr lla llb llc llk lll llr llu lra lrb lrc lrk lrr lru lua lub luc luk lul lur luu ra- raa rab rac rak ral rar rau rba rbb rbc rbk rbl rbr rbu rca rcb rcc rcl rcr rcu rkb rkc rkk rku rla rlc rll rlr rlu rra rrb rrc rrk rrl rrr rru rua rub ruc ruk rur ruu ua- uaa uab uac uak ual uar uau uba ubb ubc ubk ubl ubr ubu uca ucb ucc uck ucl ucr ucu uka ukb ukc ukk ukl ukr uku ula ulb ulc ulk ull ulr ulu ur- ura urb urc urk url urr uru uua uuc uur uuu