-al -er -ol a-a a-b aaa aab aae aag aal aao aap aar ab- aba abb abe abg abl abo abp abr aea aeb aee aeg ael aeo aep aer ag- aga agb age agg agl ago agp agr al- ala alb ale alg all alo alp alr aoa aob aoe aog aol aoo aop aor ap- apa apb ape apg apl apo app apr ar- ara arb are arg arl aro arp arr b-p baa bab bae bag bal bao bap bar bba bbb bbe bbg bbl bbo bbp bbr be- bea beb bee beg bel beo bep ber bga bgb bge bgg bgl bgo bgp bgr bla blb ble blg bll blo blp blr boa bob boe bog bol boo bop bor bpa bpb bpe bpg bpl bpo bpp bpr bra brb bre brg brl bro brp brr eaa eab eae eag eal eao eap ear eba ebb ebe ebg ebl ebo ebp ebr eea eeb eee eeg eel eeo eep eer ega egb ege egg egl ego egp egr ela elb ele elg ell elo elp elr eo- eoa eob eoe eog eol eoo eop eor ep- epa epb epe epg epl epo epp epr era erb ere erg erl ero erp err g-p gaa gab gae gag gal gao gap gar gba gbe gbg gbl gbo gbp gbr ge- gea geb gee geg gel geo gep ger gga ggb ggg ggo ggp ggr gla glb gle glg gll glo glp glr goa gob goe gog gol goo gop gor gpa gpb gpe gpg gpl gpo gpp gpr gra grb gre grg grl gro grp grr l-p la- laa lab lae lag lal lao lap lar lba lbb lbe lbg lbl lbo lbp lbr lea leb lee leg lel leo lep ler lga lgb lge lgg lgl lgo lgp lgr lla llb lle llg lll llo llp llr loa lob loe log lol loo lop lor lpa lpb lpe lpg lpl lpo lpp lpr lra lrb lrg lro lrp lrr oaa oab oae oag oal oao oap oar ob- oba obb obe obg obl obo obp obr oea oeb oee oeg oel oeo oep oer oga oge ogg ogl ogo ogp ola olb ole olg oll olo olp oo- ooa oob oog ool ooo oop oor op- opa opb ope opg opl opo opp opr or- ora orb ore org orl oro orp orr p-p paa pab pae pag pal pao pap par pba pbb pbe pbg pbl pbo pbp pbr pea peb pee peg pel peo pep per pga pgb pge pgg pgl pgo pgp pgr pla plb ple plg pll plo plp plr poa pob poe pog pol poo pop por ppa ppb ppe ppg ppl ppo ppp ppr pra prb pre prg prl pro prp prr ra- raa rab rae rag ral rao rap rar rba rbb rbe rbg rbl rbo rbp rbr re- rea reb ree reg rel reo rep rer rga rgb rge rgg rgo rgp rgr rla rle rlg rll rlo rlp rlr roa rob roe rog rol roo rop ror rpa rpb rpe rpg rpl rpo rpp rpr rra rrb rrg rrl rrp rrr