-er a-a a-b aaa aab aad aae aah aao aap aar aas ab- aba abb abd abe abh abo abp abr abs ad- ada adb add ade adh ado adp adr ads aea aeb aed aee aeh aeo aep aer aes aha ahb ahd ahe ahh aho ahp ahr ahs aoa aob aod aoe aoh aoo aop aor aos ap- apa apb apd ape aph apo app apr aps ar- ara arb ard are arh aro arp arr ars as- asa asb asd ase ash aso asp asr ass b-p baa bab bad bae bah bao bap bar bas bba bbb bbd bbe bbh bbo bbp bbr bbs bda bdb bdd bde bdh bdo bdp bdr bds be- bea beb bed bee beh beo bep ber bes bha bhb bhd bhe bhh bho bhp bhr bhs boa bob bod boe boh boo bop bor bos bpa bpb bpd bpe bph bpo bpp bpr bps bra brb brd bre brh bro brp brr brs bsa bsb bsd bse bsh bso bsp bsr bss daa dab dad dae dah dao dap dar das dba dbb dbd dbe dbh dbo dbp dbr dbs dda ddb ddd dde ddh ddo ddp ddr dds de- dea deb ded dee deh deo dep der des dh- dha dhb dhd dhe dhh dho dhp dhr dhs doa dob dod doe doh doo dop dor dos dpa dpb dpd dpe dph dpo dpp dpr dps dra drb drd dre dro drp drr drs dsa dsb dsd dse dsh dso dsp dsr dss eaa eab ead eae eah eao eap ear eas eba ebb ebd ebe ebh ebo ebp ebr ebs ed- eda edb edd ede edh edo edp edr eds eea eeb eed eee eeo eep eer ees eha ehb ehd ehe ehh eho ehp ehr ehs eo- eoa eob eod eoe eoh eoo eop eor eos ep- epa epb epd epe eph epo epp epr eps era erb erd ere erh ero erp err ers es- esa esb esd ese esh eso esp esr ess haa hab had hae hah hao hap har has hba hbb hbd hbe hbh hbo hbp hbr hbs hda hdb hdd hde hdh hdo hdp hdr hds he- hea heb hed hee heh heo hep her hes hha hhb hhd hhe hhh hho hhp hhr hhs hoa hob hod hoe hoh hoo hop hor hos hpa hpb hpd hpe hph hpo hpp hpr hps hr- hra hrb hrd hre hrh hro hrp hrr hrs hsa hsb hsd hse hsh hsp hsr hss oaa oab oad oae oah oao oap oar oas ob- oba obb obd obe obh obo obp obr obs oda odb odd ode odh odo odp odr ods oea oeb oed oee oeh oeo oep oer oes oha ohd ohe ohh oho ohp ohr ohs oo- ooa oob ood ooh ooo oop oor oos op- opa opb opd ope oph opo opp opr ops or- ora orb ord ore orh oro orp orr ors os- osa osb osd ose osh oso osp osr oss p-p paa pab pad pae pah pao pap par pas pba pbb pbd pbe pbo pbp pbr pbs pda pdb pdd pde pdh pdo pdp pdr pds pea peb ped pee peh peo pep per pes pha phb phd phe pho php phr phs poa pob pod poe poh poo pop por pos ppa ppb ppd ppe pph ppo ppp ppr pps pra prb prd pre prh pro prp prr prs ps- psa psb psd pse psh pso psp psr pss ra- raa rab rad rae rah rao rap rar ras rba rbb rbd rbe rbh rbo rbp rbr rbs rda rdb rdd rde rdh rdo rdp rdr rds re- rea reb red ree reh reo rep rer res rh- rha rhb rhd rhe rhh rho rhp rhr rhs roa rob rod roe roh roo rop ror ros rpa rpb rpd rpe rph rpo rpp rpr rps rra rrb rrd rrh rrp rrr rrs rsa rsb rsd rse rsh rso rsp rsr rss saa sab sad sae sah sao sap sar sas sba sbb sbd sbe sbh sbo sbp sbr sbs sda sdb sdd sde sdh sdo sdp sdr sds se- sea seb sed see seh seo sep ser ses sh- sha shb shd she shh sho shp shr shs soa sob sod soe soh soo sop sor sos spa spb spd spe sph spo spp spr sps sr- sra srb srd sre srh sro srp srr srs ss- ssa ssb ssd sse ssh sso ssp ssr sss