a-a a-b aaa aab aad aam aap aar ab- aba abb abd abm abp abr ad- ada adb add adm adp adr ama amb amd amm amp amr ap- apa apb apd apm app apr ar- ara arb ard arm arp arr b-p baa bab bad bam bap bar bba bbb bbd bbm bbp bbr bda bdb bdd bdm bdp bdr bma bmb bmd bmm bmp bmr bpa bpb bpd bpm bpp bpr bra brb brd brm brp brr daa dab dad dam dap dar dba dbb dbd dbm dbp dbr dda ddb ddd ddm ddp ddr dma dmb dmd dmm dmp dmr dpa dpb dpd dpm dpp dpr dra drb drd drm drp drr m-r maa mab mad mam map mar mba mbb mbd mbm mbp mbr mda mdb mdd mdm mdp mdr mma mmb mmd mmm mmp mmr mpa mpb mpd mpm mpp mpr mra mrb mrd mrm mrp mrr p-p paa pab pad pam pap par pba pbb pbd pbm pbp pbr pda pdb pdd pdm pdp pdr pma pmb pmd pmm pmp pmr ppa ppb ppd ppm ppp ppr pra prb prd prm prp prr ra- raa rab rad ram rap rar rba rbb rbd rbm rbp rbr rda rdb rdd rdm rdp rdr rma rmb rmd rmm rmp rmr rpa rpb rpd rpm rpp rpr rra rrb rrd rrm rrp rrr