a-a a-b aaa aab aad aam aao aap aar aas ab- aba abb abd abm abo abp abr abs ad- ada adb add adm ado adp adr ads ama amb amd amm amo amp amr ams aoa aob aod aom aoo aop aor aos ap- apa apb apd apm apo app apr aps ar- ara arb ard arm aro arp arr ars as- asa asb asd asm aso asp asr ass b-p baa bab bad bam bao bap bar bas bba bbb bbd bbm bbo bbp bbr bbs bda bdb bdd bdm bdo bdp bdr bds bma bmb bmd bmm bmo bmp bmr bms boa bob bod bom boo bop bor bos bpa bpb bpd bpm bpo bpp bpr bps bra brb brd brm bro brp brr brs bsa bsb bsd bsm bso bsp bsr bss daa dab dad dam dao dap dar das dba dbb dbd dbm dbo dbp dbr dbs dda ddb ddd ddm ddo ddp ddr dds dma dmb dmd dmm dmo dmp dmr dms doa dob dod dom doo dop dor dos dpa dpb dpd dpm dpo dpp dpr dps dra drb drd drm dro drp drr drs dsa dsb dsd dsm dso dsp dsr dss m-o m-r maa mab mad mam mao map mar mas mba mbb mbd mbm mbo mbp mbr mbs mda mdb mdd mdm mdo mdp mdr mds mma mmb mmd mmm mmo mmp mmr mms moa mob mod mom moo mop mor mos mpa mpb mpd mpm mpo mpp mpr mps mra mrb mrd mrm mro mrp mrr mrs msa msb msd msm mso msp msr mss oaa oab oad oam oao oap oar oas ob- oba obb obd obm obo obp obr obs oda odb odd odm odo odp odr ods om- oma omb omd omm omo omp omr oms oo- ooa oob ood oom ooo oop oor oos op- opa opb opd opm opo opp opr ops or- ora orb ord orm oro orp orr ors os- osa osb osd osm oso osp osr oss p-p paa pab pad pam pao pap par pas pba pbb pbd pbm pbo pbp pbr pbs pda pdb pdd pdm pdo pdp pdr pds pma pmb pmd pmm pmo pmp pmr pms poa pob pod pom poo pop por pos ppa ppb ppd ppm ppo ppp ppr pps pra prb prd prm pro prp prr prs ps- psa psb psd psm pso psp psr pss ra- raa rab rad ram rao rap rar ras rba rbb rbd rbm rbo rbp rbr rbs rda rdb rdd rdm rdo rdp rdr rds rma rmb rmd rmm rmo rmp rmr rms roa rob rod rom roo rop ror ros rpa rpb rpd rpm rpo rpp rpr rps rra rrb rrd rrm rrp rrr rrs rsa rsb rsd rsm rso rsp rsr rss saa sab sad sam sao sap sar sas sba sbb sbd sbm sbo sbp sbr sbs sda sdb sdd sdm sdo sdp sdr sds sma smb smd smm smo smp smr sms soa sob sod som soo sop sor sos spa spb spd spm spo spp spr sps sr- sra srb srd srm sro srp srr srs ss- ssa ssb ssd ssm sso ssp ssr sss