a-a a-b aaa aab aaj aak aam aan aao aar ab- aba abb abj abk abm abn abo abr aja ajb ajj ajk ajm ajn ajo ajr aka akb akj akk akm akn ako akr ama amb amk amm amn amo amr an- ana anb anj ank anm ann ano anr aoa aob aoj aok aom aon aoo aor ar- ara arb arj ark arm arn aro arr baa bab baj bak bam ban bao bar bba bbb bbk bbm bbn bbo bbr bja bjj bjk bjm bjn bjr bka bkb bkk bkm bkn bko bkr bma bmb bmj bmk bmm bmn bmo bmr bna bnb bnj bnk bnn bno bnr boa bob boj bok bom bon boo bor bra brb brj brk brm brn bro brr jaa jab jaj jak jam jan jao jar jba jbj jbk jbm jbo jbr jja jjb jjj jjk jjr jka jkb jkk jkm jkn jko jkr jma jmb jmj jmm jmn jmo jmr jna jnj jnn jno jnr joa job joj jok jom jon joo jor jra jrb jrk jrm jrn jro jrr ka- kaa kab kaj kak kam kan kao kar kba kbb kbk kbm kbn kbo kbr kjb kjr kkb kkk kkm kkn kkr kma kmb kmj kmk kmm kmo kn- kna knk knm knn kno knr koa kob kok kom kon koo kor kra krk krn kro krr m-o m-r maa mab maj mak mam man mao mar mba mbb mbj mbk mbm mbo mbr mjb mjj mjk mjm mjr mka mkb mkk mkm mkn mko mkr mma mmb mmj mmk mmm mmn mmo mmr mna mnb mnj mnk mnm mnn mno mnr moa mob mok mom mon moo mor mra mrb mrj mrk mrm mrn mro mrr naa nab naj nak nam nan nao nar nba nbb nbk nbm nbn nbo nbr nja njk njm njn nka nkj nkk nkm nkn nko nkr nma nmb nmk nmm nmn nmo nmr nna nnb nnk nnm nnn nno no- noa nob noj nok nom non noo nor nra nrb nrj nrk nrm nrn nro nrr oaa oab oaj oak oam oan oao oar ob- oba obb obj obk obm obn obo obr oja ojb ojm ojo oka okb okj okk oko okr om- oma omb omj omm omn omo omr on- ona onb onj onk onn ono onr oo- ooa oob ook oom oon ooo oor or- ora orb ork orm orn oro orr ra- raa rab raj rak ram ran rao rar rba rbb rbk rbm rbn rbo rbr rja rjk rjm rjr rkb rkk rkm rko rma rmb rmm rmn rmo rmr rna rnb rnm rnn rno rnr roa rob roj rok rom ron roo ror rra rrb rrk rrm rrn rrr