-al -er -ic -ol a-a a-b a-c a-i aaa aab aac aae aai aak aal aao aap aar ab- aba abb abc abe abi abk abl abo abp abr ac- aca acb acc ace aci ack acl aco acp acr aea aeb aec aee aei aek ael aeo aep aer ai- aia aib aic aie aii aik ail aio aip air aka akb akc ake aki akk akl ako akp akr al- ala alb alc ale ali alk all alo alp alr aoa aob aoc aoe aoi aok aol aoo aop aor ap- apa apb apc ape api apk apl apo app apr ar- ara arb arc are ari ark arl aro arp arr b-p baa bab bac bae bai bak bal bao bap bar bba bbb bbc bbe bbi bbk bbl bbo bbp bbr bca bcb bcc bce bci bck bcl bco bcp bcr be- bea beb bec bee bei bek bel beo bep ber bi- bia bib bic bie bii bik bil bio bip bir bka bkb bkc bke bkk bkl bko bkp bkr bla blb blc ble bli blk bll blo blp blr boa bob boc boe boi bok bol boo bop bor bpa bpb bpc bpe bpi bpl bpo bpp bpr bra brb bre bri brk brl bro brp brr c-- caa cab cac cae cai cak cal cao cap car cba cbb cbc cbe cbi cbk cbl cbo cbp cbr cca ccb ccc cce cci cck ccl cco ccp ccr ce- cea ceb cec cee cei cek cel ceo cep cer ci- cia cib cic cie cii cik cil cio cip cir cka ckb ckc cki cko cl- cla clb clc cle cli clk cll clo clp clr co- coa cob coc coe coi cok col coo cop cor cpa cpb cpc cpe cpi cpk cpl cpo cpp cpr cra crb crc cre cri crk crl cro crp crr eaa eab eac eae eai eak eal eao eap ear eba ebb ebc ebe ebi ebk ebl ebo ebp ebr ec- eca ecb ecc ece eci eck ecl eco ecr eea eeb eec eee eek eel eeo eep eer eia eib eic eie eii eik eil eio eip eir eka ekb ekc eke eki ekl eko ekp ekr ela elb elc ele eli elk ell elo elp elr eo- eoa eob eoc eoe eoi eok eol eoo eop eor ep- epa epb epc epe epi epl epo epp epr era erb erc ere eri erk erl ero erp err ia- iaa iab iac iae iai ial iao iap iar iba ibb ibc ibe ibi ibk ibl ibo ibp ibr ica icb icc ice ici ick icl ico icp icr ie- iea iec iee iei iek iel iep ier iia iib iic iie iii iil iio iip iir ika ikb ikc ike iki ikk ikl iko ikr il- ila ilb ilc ile ili ilk ill ilo ilp ilr io- ioa iob ioc ioe ioi iol ioo iop ior ipa ipb ipc ipe ipi ipl ipo ipp ipr ir- ira irb irc ire iri irk irl iro irp irr ka- kaa kab kac kae kai kak kal kao kap kar kba kbb kbc kbe kbi kbk kbl kbo kbp kbr kca kcb kcc kce kci kck kcl kcp kcr ke- kea keb kec kee kei kek kel keo kep ker kia kib kic kie kii kik kil kio kip kir kkb kkc kke kki kkk kkl kkp kkr kl- kla klb klc kli klo klr koa kob koc koe koi kok kol koo kop kor kpa kpc kpe kpi kpk kpl kpo kpp kpr kra krc kri krk krl kro krp krr l-p la- laa lab lac lae lai lak lal lao lap lar lba lbb lbc lbe lbi lbk lbl lbo lbp lbr lca lcb lcc lce lci lck lcl lco lcp lcr lea leb lec lee lei lek lel leo lep ler lia lib lic lie lii lik lil lio lip lir lka lkb lkl lkp lkr lla llb llc lle lli llk lll llo llp llr loa lob loc loe loi lok lol loo lop lor lpa lpb lpc lpe lpi lpk lpl lpo lpp lpr lra lrb lrc lri lrk lro lrp lrr o-i oaa oab oac oae oai oak oal oao oap oar ob- oba obb obc obe obi obk obl obo obp obr oc- oca ocb occ oci ock ocl oco ocp ocr oea oeb oec oee oei oel oeo oep oer oia oib oic oie oii oik oil oio oip oir oka okb okc oke oki okk okl oko okp okr ola olb olc ole oli olk oll olo olp oo- ooa oob ooc ooi ook ool ooo oop oor op- opa opb opc ope opi opk opl opo opp opr or- ora orb orc ore ori ork orl oro orp orr p-p paa pab pac pae pai pak pal pao pap par pba pbb pbc pbe pbi pbk pbl pbo pbp pbr pca pcb pcc pce pci pck pcl pco pcp pcr pea peb pec pee pei pek pel peo pep per pia pib pic pie pii pik pil pio pip pir pka pkb pkc pke pki pkl pko pkp pkr pla plb plc ple pli plk pll plo plp plr poa pob poc poe poi pok pol poo pop por ppa ppb ppc ppe ppi ppk ppl ppo ppp ppr pra prb prc pre pri prk prl pro prp prr ra- raa rab rac rae rai rak ral rao rap rar rba rbb rbc rbe rbi rbk rbl rbo rbp rbr rca rcb rcc rce rci rcl rco rcp rcr re- rea reb rec ree rei rek rel reo rep rer ria rib ric rie rii rik ril rio rip rir rkb rkc rke rkk rko rkp rla rlc rle rli rll rlo rlp rlr roa rob roc roe roi rok rol roo rop ror rpa rpb rpc rpe rpi rpk rpl rpo rpp rpr rra rrb rrc rri rrk rrl rrp rrr