-al a-a a-b a-c a-t aaa aab aac aak aal aar aat aau ab- aba abb abc abk abl abr abt abu ac- aca acb acc ack acl acr act acu aka akb akc akk akl akr aku al- ala alb alc alk all alr alt alu ar- ara arb arc ark arl arr art aru at- ata atb atc atl atr att atu au- aua aub auc auk aul aur aut b-u baa bab bac bak bal bar bat bau bba bbb bbc bbk bbl bbr bbt bbu bca bcb bcc bck bcl bcr bct bcu bka bkb bkc bkk bkl bkr bkt bla blb blc blk bll blr blt blu bra brb brk brl brr brt bru bta btb btc btk btl btr btt btu bua bub buc buk bul bur but buu c-- caa cab cac cak cal car cat cau cba cbb cbc cbk cbl cbr cbt cbu cca ccb ccc cck ccl ccr cct ccu cka ckb ckc ckt cl- cla clb clc clk cll clr clt clu cra crb crc crk crl crr crt cru cta ctb ctc ctk ctl ctr ctt ctu cua cub cuc cuk cul cur cut cuu k-t ka- kaa kab kac kak kal kar kat kau kba kbb kbc kbk kbl kbr kbu kca kcb kcc kck kcl kcr kct kcu kkb kkc kkk kkl kkr kkt kku kl- kla klb klc klr klt klu kra krc krk krl krr krt kru kta ktb ktc ktk ktl ktr ktt ktu kub kuc kuk kul kur kut kuu la- laa lab lac lak lal lar lat lau lba lbb lbc lbk lbl lbr lbt lbu lca lcb lcc lck lcl lcr lct lcu lka lkb lkl lkr lkt lla llb llc llk lll llr llt llu lra lrb lrc lrk lrr lrt lru lta ltb ltc ltk ltl ltr ltt ltu lua lub luc luk lul lur lut luu ra- raa rab rac rak ral rar rat rau rba rbb rbc rbk rbl rbr rbt rbu rca rcb rcc rcl rcr rct rcu rkb rkc rkk rkt rku rla rlc rll rlr rlt rlu rra rrb rrc rrk rrl rrr rrt rru rta rtb rtc rtk rtl rtr rtt rtu rua rub ruc ruk rur rut ruu taa tab tac tak tal tar tat tau tba tbb tbc tbk tbl tbr tbt tbu tca tcb tcc tck tcl tcr tct tcu tka tkb tkc tkk tkl tkr tkt tla tlc tlk tll tlr tlt tlu tra trb trc trk trl trr trt tru tta ttb ttc ttk ttl ttr ttt ttu tua tub tuc tuk tul tur tut tuu ua- uaa uab uac uak ual uar uat uau uba ubb ubc ubk ubl ubr ubt ubu uca ucb ucc uck ucl ucr uct ucu uka ukb ukc ukk ukl ukr uku ula ulb ulc ulk ull ulr ult ulu ur- ura urb urc urk url urr urt uru uta utb utc utk utl utr utt utu uua uuc uur uut uuu