a-a a-b aaa aab aaj aam aan aao aap aar ab- aba abb abj abm abn abo abp abr aja ajb ajj ajm ajn ajo ajp ajr ama amb amm amn amo amp amr an- ana anb anj anm ann ano anp anr aoa aob aoj aom aon aoo aop aor ap- apa apb apj apm apn apo app apr ar- ara arb arj arm arn aro arp arr b-p baa bab baj bam ban bao bap bar bba bbb bbm bbn bbo bbp bbr bja bjj bjm bjn bjp bjr bma bmb bmj bmm bmn bmo bmp bmr bna bnb bnj bnn bno bnp bnr boa bob boj bom bon boo bop bor bpa bpb bpm bpn bpo bpp bpr bra brb brj brm brn bro brp brr jaa jab jaj jam jan jao jap jar jba jbj jbm jbo jbr jja jjb jjj jjp jjr jma jmb jmj jmm jmn jmo jmp jmr jna jnj jnn jno jnp jnr joa job joj jom jon joo jop jor jpa jpb jpj jpm jpn jpo jpp jpr jra jrb jrm jrn jro jrp jrr m-o m-r maa mab maj mam man mao map mar mba mbb mbj mbm mbo mbp mbr mjb mjj mjm mjp mjr mma mmb mmj mmm mmn mmo mmp mmr mna mnb mnj mnm mnn mno mnp mnr moa mob mom mon moo mop mor mpa mpb mpm mpn mpo mpp mpr mra mrb mrj mrm mrn mro mrp mrr naa nab naj nam nan nao nap nar nba nbb nbm nbn nbo nbp nbr nja njm njn njp nma nmb nmm nmn nmo nmp nmr nna nnb nnm nnn nno nnp no- noa nob noj nom non noo nop nor npa npb npm npn npo npp npr nra nrb nrj nrm nrn nro nrp nrr oaa oab oaj oam oan oao oap oar ob- oba obb obj obm obn obo obp obr oja ojb ojm ojo om- oma omb omj omm omn omo omp omr on- ona onb onj onn ono onp onr oo- ooa oob oom oon ooo oop oor op- opa opb opj opm opn opo opp opr or- ora orb orm orn oro orp orr p-p paa pab paj pam pan pao pap par pba pbb pbj pbm pbn pbo pbp pbr pja pjm pjo pjp pma pmb pmm pmn pmo pmp pmr pn- pna pnb pnm pnn pno pnp pnr poa pob pom pon poo pop por ppa ppb ppj ppm ppn ppo ppp ppr pra prb prm prn pro prp prr ra- raa rab raj ram ran rao rap rar rba rbb rbm rbn rbo rbp rbr rja rjm rjp rjr rma rmb rmm rmn rmo rmp rmr rna rnb rnm rnn rno rnp rnr roa rob roj rom ron roo rop ror rpa rpb rpm rpn rpo rpp rpr rra rrb rrm rrn rrp rrr