-er a-a a-b aaa aab aae aaj aam aan aao aar ab- aba abb abe abj abm abn abo abr aea aeb aee aej aem aen aeo aer aja ajb aje ajj ajm ajn ajo ajr ama amb ame amm amn amo amr an- ana anb ane anj anm ann ano anr aoa aob aoe aoj aom aon aoo aor ar- ara arb are arj arm arn aro arr baa bab bae baj bam ban bao bar bba bbb bbe bbm bbn bbo bbr be- bea beb bee bem ben beo ber bja bjj bjm bjn bjr bma bmb bme bmj bmm bmn bmo bmr bna bnb bne bnj bnn bno bnr boa bob boe boj bom bon boo bor bra brb bre brj brm brn bro brr eaa eab eae eaj eam ean eao ear eba ebb ebe ebj ebm ebn ebo ebr eea eeb eee eem een eeo eer eja ejo em- ema emb eme emm emn emo emr en- ena enb ene enm enn eno enr eo- eoa eob eoe eom eon eoo eor era erb ere erm ern ero err jaa jab jae jaj jam jan jao jar jba jbj jbm jbo jbr jea jeb jee jej jem jen jeo jer jja jjb jjj jjr jma jmb jme jmj jmm jmn jmo jmr jna jne jnj jnn jno jnr joa job joe joj jom jon joo jor jra jrb jrm jrn jro jrr m-o m-r maa mab mae maj mam man mao mar mba mbb mbe mbj mbm mbo mbr mea meb mee mej mem men meo mer mjb mje mjj mjm mjr mma mmb mme mmj mmm mmn mmo mmr mna mnb mne mnj mnm mnn mno mnr moa mob moe mom mon moo mor mra mrb mre mrj mrm mrn mro mrr naa nab nae naj nam nan nao nar nba nbb nbe nbm nbn nbo nbr ne- nea neb nee nej nem nen neo ner nja nje njm njn nma nmb nme nmm nmn nmo nmr nna nnb nne nnm nnn nno no- noa nob noe noj nom non noo nor nra nrb nre nrj nrm nrn nro nrr oaa oab oae oaj oam oan oao oar ob- oba obb obe obj obm obn obo obr oea oeb oee oem oen oeo oer oja ojb oje ojm ojo om- oma omb ome omj omm omn omo omr on- ona onb one onj onn ono onr oo- ooa oob oom oon ooo oor or- ora orb ore orm orn oro orr ra- raa rab rae raj ram ran rao rar rba rbb rbe rbm rbn rbo rbr re- rea reb ree rem ren reo rer rja rjm rjr rma rmb rme rmm rmn rmo rmr rna rnb rnm rnn rno rnr roa rob roe roj rom ron roo ror rra rrb rrm rrn rrr