a-a a-b aaa aab aam aan aap aar ab- aba abb abm abn abp abr ama amb amm amn amp amr an- ana anb anm ann anp anr ap- apa apb apm apn app apr ar- ara arb arm arn arp arr b-p baa bab bam ban bap bar bba bbb bbm bbn bbp bbr bma bmb bmm bmn bmp bmr bna bnb bnn bnp bnr bpa bpb bpm bpn bpp bpr bra brb brm brn brp brr m-r maa mab mam man map mar mba mbb mbm mbp mbr mma mmb mmm mmn mmp mmr mna mnb mnm mnn mnp mnr mpa mpb mpm mpn mpp mpr mra mrb mrm mrn mrp mrr naa nab nam nan nap nar nba nbb nbm nbn nbp nbr nma nmb nmm nmn nmp nmr nna nnb nnm nnn nnp npa npb npm npn npp npr nra nrb nrm nrn nrp nrr p-p paa pab pam pan pap par pba pbb pbm pbn pbp pbr pma pmb pmm pmn pmp pmr pn- pna pnb pnm pnn pnp pnr ppa ppb ppm ppn ppp ppr pra prb prm prn prp prr ra- raa rab ram ran rap rar rba rbb rbm rbn rbp rbr rma rmb rmm rmn rmp rmr rna rnb rnm rnn rnp rnr rpa rpb rpm rpn rpp rpr rra rrb rrm rrn rrp rrr