-er a-a a-b aaa aab aae aag aam aan aao aap aar ab- aba abb abe abg abm abn abo abp abr aea aeb aee aeg aem aen aeo aep aer ag- aga agb age agg agm agn ago agp agr ama amb ame amg amm amn amo amp amr an- ana anb ane ang anm ann ano anp anr aoa aob aoe aog aom aon aoo aop aor ap- apa apb ape apg apm apn apo app apr ar- ara arb are arg arm arn aro arp arr b-p baa bab bae bag bam ban bao bap bar bba bbb bbe bbg bbm bbn bbo bbp bbr be- bea beb bee beg bem ben beo bep ber bga bgb bge bgg bgm bgn bgo bgp bgr bma bmb bme bmg bmm bmn bmo bmp bmr bna bnb bne bng bnn bno bnp bnr boa bob boe bog bom bon boo bop bor bpa bpb bpe bpg bpm bpn bpo bpp bpr bra brb bre brg brm brn bro brp brr eaa eab eae eag eam ean eao eap ear eba ebb ebe ebg ebm ebn ebo ebp ebr eea eeb eee eeg eem een eeo eep eer ega egb ege egg egm egn ego egp egr em- ema emb eme emg emm emn emo emp emr en- ena enb ene eng enm enn eno enp enr eo- eoa eob eoe eog eom eon eoo eop eor ep- epa epb epe epg epm epn epo epp epr era erb ere erg erm ern ero erp err g-p gaa gab gae gag gam gan gao gap gar gba gbe gbg gbm gbn gbo gbp gbr ge- gea geb gee geg gem gen geo gep ger gga ggb ggg ggm ggn ggo ggp ggr gma gmb gme gmg gmm gmn gmo gmp gmr gna gnb gne gnm gnn gno gnp gnr goa gob goe gog gom gon goo gop gor gpa gpb gpe gpg gpm gpn gpo gpp gpr gra grb gre grg grm grn gro grp grr m-o m-r maa mab mae mag mam man mao map mar mba mbb mbe mbg mbm mbo mbp mbr mea meb mee meg mem men meo mep mer mga mgb mge mgm mgn mgo mgp mgr mma mmb mme mmg mmm mmn mmo mmp mmr mna mnb mne mng mnm mnn mno mnp mnr moa mob moe mog mom mon moo mop mor mpa mpb mpe mpg mpm mpn mpo mpp mpr mra mrb mre mrg mrm mrn mro mrp mrr naa nab nae nag nam nan nao nap nar nba nbb nbe nbg nbm nbn nbo nbp nbr ne- nea neb nee neg nem nen neo nep ner nga ngb nge ngg ngm ngn ngo ngp nma nmb nme nmg nmm nmn nmo nmp nmr nna nnb nne nng nnm nnn nno nnp no- noa nob noe nog nom non noo nop nor npa npb npe npg npm npn npo npp npr nra nrb nre nrg nrm nrn nro nrp nrr oaa oab oae oag oam oan oao oap oar ob- oba obb obe obg obm obn obo obp obr oea oeb oee oeg oem oen oeo oep oer oga oge ogg ogn ogo ogp om- oma omb ome omg omm omn omo omp omr on- ona onb one ong onn ono onp onr oo- ooa oob oog oom oon ooo oop oor op- opa opb ope opg opm opn opo opp opr or- ora orb ore org orm orn oro orp orr p-p paa pab pae pag pam pan pao pap par pba pbb pbe pbg pbm pbn pbo pbp pbr pea peb pee peg pem pen peo pep per pga pgb pge pgg pgm pgn pgo pgp pgr pma pmb pme pmg pmm pmn pmo pmp pmr pn- pna pnb pne png pnm pnn pno pnp pnr poa pob poe pog pom pon poo pop por ppa ppb ppe ppg ppm ppn ppo ppp ppr pra prb pre prg prm prn pro prp prr ra- raa rab rae rag ram ran rao rap rar rba rbb rbe rbg rbm rbn rbo rbp rbr re- rea reb ree reg rem ren reo rep rer rga rgb rge rgg rgn rgo rgp rgr rma rmb rme rmg rmm rmn rmo rmp rmr rna rnb rng rnm rnn rno rnp rnr roa rob roe rog rom ron roo rop ror rpa rpb rpe rpg rpm rpn rpo rpp rpr rra rrb rrg rrm rrn rrp rrr