-al -er -ol a-a a-b a-c aaa aab aac aae aal aao aap aar ab- aba abb abc abe abl abo abp abr ac- aca acb acc ace acl aco acp acr aea aeb aec aee ael aeo aep aer al- ala alb alc ale all alo alp alr aoa aob aoc aoe aol aoo aop aor ap- apa apb apc ape apl apo app apr ar- ara arb arc are arl aro arp arr b-p baa bab bac bae bal bao bap bar bba bbb bbc bbe bbl bbo bbp bbr bca bcb bcc bce bcl bco bcp bcr be- bea beb bec bee bel beo bep ber bla blb blc ble bll blo blp blr boa bob boc boe bol boo bop bor bpa bpb bpc bpe bpl bpo bpp bpr bra brb bre brl bro brp brr c-- caa cab cac cae cal cao cap car cba cbb cbc cbe cbl cbo cbp cbr cca ccb ccc cce ccl cco ccp ccr ce- cea ceb cec cee cel ceo cep cer cl- cla clb clc cle cll clo clp clr co- coa cob coc coe col coo cop cor cpa cpb cpc cpe cpl cpo cpp cpr cra crb crc cre crl cro crp crr eaa eab eac eae eal eao eap ear eba ebb ebc ebe ebl ebo ebp ebr ec- eca ecb ecc ece ecl eco ecr eea eeb eec eee eel eeo eep eer ela elb elc ele ell elo elp elr eo- eoa eob eoc eoe eol eoo eop eor ep- epa epb epc epe epl epo epp epr era erb erc ere erl ero erp err l-p la- laa lab lac lae lal lao lap lar lba lbb lbc lbe lbl lbo lbp lbr lca lcb lcc lce lcl lco lcp lcr lea leb lec lee lel leo lep ler lla llb llc lle lll llo llp llr loa lob loc loe lol loo lop lor lpa lpb lpc lpe lpl lpo lpp lpr lra lrb lrc lro lrp lrr oaa oab oac oae oal oao oap oar ob- oba obb obc obe obl obo obp obr oc- oca ocb occ ocl oco ocp ocr oea oeb oec oee oel oeo oep oer ola olb olc ole oll olo olp oo- ooa oob ooc ool ooo oop oor op- opa opb opc ope opl opo opp opr or- ora orb orc ore orl oro orp orr p-p paa pab pac pae pal pao pap par pba pbb pbc pbe pbl pbo pbp pbr pca pcb pcc pce pcl pco pcp pcr pea peb pec pee pel peo pep per pla plb plc ple pll plo plp plr poa pob poc poe pol poo pop por ppa ppb ppc ppe ppl ppo ppp ppr pra prb prc pre prl pro prp prr ra- raa rab rac rae ral rao rap rar rba rbb rbc rbe rbl rbo rbp rbr rca rcb rcc rce rcl rco rcp rcr re- rea reb rec ree rel reo rep rer rla rlc rle rll rlo rlp rlr roa rob roc roe rol roo rop ror rpa rpb rpc rpe rpl rpo rpp rpr rra rrb rrc rrl rrp rrr