-al -ic a-a a-b a-c a-i aaa aab aac aai aak aal aar ab- aba abb abc abi abk abl abr ac- aca acb acc aci ack acl acr ai- aia aib aic aii aik ail air aka akb akc aki akk akl akr al- ala alb alc ali alk all alr ar- ara arb arc ari ark arl arr baa bab bac bai bak bal bar bba bbb bbc bbi bbk bbl bbr bca bcb bcc bci bck bcl bcr bi- bia bib bic bii bik bil bir bka bkb bkc bkk bkl bkr bla blb blc bli blk bll blr bra brb bri brk brl brr c-- caa cab cac cai cak cal car cba cbb cbc cbi cbk cbl cbr cca ccb ccc cci cck ccl ccr ci- cia cib cic cii cik cil cir cka ckb ckc cki cl- cla clb clc cli clk cll clr cra crb crc cri crk crl crr ia- iaa iab iac iai ial iar iba ibb ibc ibi ibk ibl ibr ica icb icc ici ick icl icr iia iib iic iii iil iir ika ikb ikc iki ikk ikl ikr il- ila ilb ilc ili ilk ill ilr ir- ira irb irc iri irk irl irr ka- kaa kab kac kai kak kal kar kba kbb kbc kbi kbk kbl kbr kca kcb kcc kci kck kcl kcr kia kib kic kii kik kil kir kkb kkc kki kkk kkl kkr kl- kla klb klc kli klr kra krc kri krk krl krr la- laa lab lac lai lak lal lar lba lbb lbc lbi lbk lbl lbr lca lcb lcc lci lck lcl lcr lia lib lic lii lik lil lir lka lkb lkl lkr lla llb llc lli llk lll llr lra lrb lrc lri lrk lrr ra- raa rab rac rai rak ral rar rba rbb rbc rbi rbk rbl rbr rca rcb rcc rci rcl rcr ria rib ric rii rik ril rir rkb rkc rkk rla rlc rli rll rlr rra rrb rrc rri rrk rrl rrr