-al -er a-a a-b a-i aaa aab aae aai aak aal aap aar ab- aba abb abe abi abk abl abp abr aea aeb aee aei aek ael aep aer ai- aia aib aie aii aik ail aip air aka akb ake aki akk akl akp akr al- ala alb ale ali alk all alp alr ap- apa apb ape api apk apl app apr ar- ara arb are ari ark arl arp arr b-p baa bab bae bai bak bal bap bar bba bbb bbe bbi bbk bbl bbp bbr be- bea beb bee bei bek bel bep ber bi- bia bib bie bii bik bil bip bir bka bkb bke bkk bkl bkp bkr bla blb ble bli blk bll blp blr bpa bpb bpe bpi bpl bpp bpr bra brb bre bri brk brl brp brr eaa eab eae eai eak eal eap ear eba ebb ebe ebi ebk ebl ebp ebr eea eeb eee eek eel eep eer eia eib eie eii eik eil eip eir eka ekb eke eki ekl ekp ekr ela elb ele eli elk ell elp elr ep- epa epb epe epi epl epp epr era erb ere eri erk erl erp err ia- iaa iab iae iai ial iap iar iba ibb ibe ibi ibk ibl ibp ibr ie- iea iee iei iek iel iep ier iia iib iie iii iil iip iir ika ikb ike iki ikk ikl ikr il- ila ilb ile ili ilk ill ilp ilr ipa ipb ipe ipi ipl ipp ipr ir- ira irb ire iri irk irl irp irr ka- kaa kab kae kai kak kal kap kar kba kbb kbe kbi kbk kbl kbp kbr ke- kea keb kee kei kek kel kep ker kia kib kie kii kik kil kip kir kkb kke kki kkk kkl kkp kkr kl- kla klb kli klr kpa kpe kpi kpk kpl kpp kpr kra kri krk krl krp krr l-p la- laa lab lae lai lak lal lap lar lba lbb lbe lbi lbk lbl lbp lbr lea leb lee lei lek lel lep ler lia lib lie lii lik lil lip lir lka lkb lkl lkp lkr lla llb lle lli llk lll llp llr lpa lpb lpe lpi lpk lpl lpp lpr lra lrb lri lrk lrp lrr p-p paa pab pae pai pak pal pap par pba pbb pbe pbi pbk pbl pbp pbr pea peb pee pei pek pel pep per pia pib pie pii pik pil pip pir pka pkb pke pki pkl pkp pkr pla plb ple pli plk pll plp plr ppa ppb ppe ppi ppk ppl ppp ppr pra prb pre pri prk prl prp prr ra- raa rab rae rai rak ral rap rar rba rbb rbe rbi rbk rbl rbp rbr re- rea reb ree rei rek rel rep rer ria rib rie rii rik ril rip rir rkb rke rkk rkp rla rle rli rll rlp rlr rpa rpb rpe rpi rpk rpl rpp rpr rra rrb rri rrk rrl rrp rrr