-al -er -ol a-a a-b a-c aaa aab aac aae aak aal aao aap aar ab- aba abb abc abe abk abl abo abp abr ac- aca acb acc ace ack acl aco acp acr aea aeb aec aee aek ael aeo aep aer aka akb akc ake akk akl ako akp akr al- ala alb alc ale alk all alo alp alr aoa aob aoc aoe aok aol aoo aop aor ap- apa apb apc ape apk apl apo app apr ar- ara arb arc are ark arl aro arp arr b-p baa bab bac bae bak bal bao bap bar bba bbb bbc bbe bbk bbl bbo bbp bbr bca bcb bcc bce bck bcl bco bcp bcr be- bea beb bec bee bek bel beo bep ber bka bkb bkc bke bkk bkl bko bkp bkr bla blb blc ble blk bll blo blp blr boa bob boc boe bok bol boo bop bor bpa bpb bpc bpe bpl bpo bpp bpr bra brb bre brk brl bro brp brr c-- caa cab cac cae cak cal cao cap car cba cbb cbc cbe cbk cbl cbo cbp cbr cca ccb ccc cce cck ccl cco ccp ccr ce- cea ceb cec cee cek cel ceo cep cer cka ckb ckc cko cl- cla clb clc cle clk cll clo clp clr co- coa cob coc coe cok col coo cop cor cpa cpb cpc cpe cpk cpl cpo cpp cpr cra crb crc cre crk crl cro crp crr eaa eab eac eae eak eal eao eap ear eba ebb ebc ebe ebk ebl ebo ebp ebr ec- eca ecb ecc ece eck ecl eco ecr eea eeb eec eee eek eel eeo eep eer eka ekb ekc eke ekl eko ekp ekr ela elb elc ele elk ell elo elp elr eo- eoa eob eoc eoe eok eol eoo eop eor ep- epa epb epc epe epl epo epp epr era erb erc ere erk erl ero erp err ka- kaa kab kac kae kak kal kao kap kar kba kbb kbc kbe kbk kbl kbo kbp kbr kca kcb kcc kce kck kcl kcp kcr ke- kea keb kec kee kek kel keo kep ker kkb kkc kke kkk kkl kkp kkr kl- kla klb klc klo klr koa kob koc koe kok kol koo kop kor kpa kpc kpe kpk kpl kpo kpp kpr kra krc krk krl kro krp krr l-p la- laa lab lac lae lak lal lao lap lar lba lbb lbc lbe lbk lbl lbo lbp lbr lca lcb lcc lce lck lcl lco lcp lcr lea leb lec lee lek lel leo lep ler lka lkb lkl lkp lkr lla llb llc lle llk lll llo llp llr loa lob loc loe lok lol loo lop lor lpa lpb lpc lpe lpk lpl lpo lpp lpr lra lrb lrc lrk lro lrp lrr oaa oab oac oae oak oal oao oap oar ob- oba obb obc obe obk obl obo obp obr oc- oca ocb occ ock ocl oco ocp ocr oea oeb oec oee oel oeo oep oer oka okb okc oke okk okl oko okp okr ola olb olc ole olk oll olo olp oo- ooa oob ooc ook ool ooo oop oor op- opa opb opc ope opk opl opo opp opr or- ora orb orc ore ork orl oro orp orr p-p paa pab pac pae pak pal pao pap par pba pbb pbc pbe pbk pbl pbo pbp pbr pca pcb pcc pce pck pcl pco pcp pcr pea peb pec pee pek pel peo pep per pka pkb pkc pke pkl pko pkp pkr pla plb plc ple plk pll plo plp plr poa pob poc poe pok pol poo pop por ppa ppb ppc ppe ppk ppl ppo ppp ppr pra prb prc pre prk prl pro prp prr ra- raa rab rac rae rak ral rao rap rar rba rbb rbc rbe rbk rbl rbo rbp rbr rca rcb rcc rce rcl rco rcp rcr re- rea reb rec ree rek rel reo rep rer rkb rkc rke rkk rko rkp rla rlc rle rll rlo rlp rlr roa rob roc roe rok rol roo rop ror rpa rpb rpc rpe rpk rpl rpo rpp rpr rra rrb rrc rrk rrl rrp rrr