-er -th a-a a-b a-t aaa aab aad aae aah aao aap aar aat ab- aba abb abd abe abh abo abp abr abt ad- ada adb add ade adh ado adp adr adt aea aeb aed aee aeh aeo aep aer aet aha ahb ahd ahe ahh aho ahp ahr aht aoa aob aod aoe aoh aoo aop aor aot ap- apa apb apd ape aph apo app apr apt ar- ara arb ard are arh aro arp arr art at- ata atb atd ate ath ato atp atr att b-p baa bab bad bae bah bao bap bar bat bba bbb bbd bbe bbh bbo bbp bbr bbt bda bdb bdd bde bdh bdo bdp bdr bdt be- bea beb bed bee beh beo bep ber bet bha bhb bhd bhe bhh bho bhp bhr bht boa bob bod boe boh boo bop bor bot bpa bpb bpd bpe bph bpo bpp bpr bpt bra brb brd bre brh bro brp brr brt bta btb btd bte bth bto btp btr btt daa dab dad dae dah dao dap dar dat dba dbb dbd dbe dbh dbo dbp dbr dbt dda ddb ddd dde ddh ddo ddp ddr ddt de- dea deb ded dee deh deo dep der det dh- dha dhb dhd dhe dhh dho dhp dhr dht doa dob dod doe doh doo dop dor dot dpa dpb dpd dpe dph dpo dpp dpr dpt dra drb drd dre dro drp drr drt dta dtb dtd dte dth dto dtp dtr dtt eaa eab ead eae eah eao eap ear eat eba ebb ebd ebe ebh ebo ebp ebr ebt ed- eda edb edd ede edh edo edp edr edt eea eeb eed eee eeo eep eer eet eha ehb ehd ehe ehh eho ehp ehr eht eo- eoa eob eod eoe eoh eoo eop eor eot ep- epa epb epd epe eph epo epp epr ept era erb erd ere erh ero erp err ert eta etb etd ete eth eto etp etr ett haa hab had hae hah hao hap har hat hba hbb hbd hbe hbh hbo hbp hbr hbt hda hdb hdd hde hdh hdo hdp hdr hdt he- hea heb hed hee heh heo hep her het hha hhb hhd hhe hhh hho hhp hhr hht hoa hob hod hoe hoh hoo hop hor hot hpa hpb hpd hpe hph hpo hpp hpr hpt hr- hra hrb hrd hre hrh hro hrp hrr hrt hta htb htd hte hth hto htp htr htt oaa oab oad oae oah oao oap oar oat ob- oba obb obd obe obh obo obp obr obt oda odb odd ode odh odo odp odr odt oea oeb oed oee oeh oeo oep oer oet oha ohd ohe ohh oho ohp ohr oht oo- ooa oob ood ooh ooo oop oor oot op- opa opb opd ope oph opo opp opr opt or- ora orb ord ore orh oro orp orr ort ot- ota otb otd ote oth oto otp otr ott p-p paa pab pad pae pah pao pap par pat pba pbb pbd pbe pbo pbp pbr pbt pda pdb pdd pde pdh pdo pdp pdr pdt pea peb ped pee peh peo pep per pet pha phb phd phe pho php phr pht poa pob pod poe poh poo pop por pot ppa ppb ppd ppe pph ppo ppp ppr ppt pra prb prd pre prh pro prp prr prt pt- pta ptb ptd pte pth pto ptp ptr ptt ra- raa rab rad rae rah rao rap rar rat rba rbb rbd rbe rbh rbo rbp rbr rbt rda rdb rdd rde rdh rdo rdp rdr rdt re- rea reb red ree reh reo rep rer ret rh- rha rhb rhd rhe rhh rho rhp rhr rht roa rob rod roe roh roo rop ror rot rpa rpb rpd rpe rph rpo rpp rpr rpt rra rrb rrd rrh rrp rrr rrt rta rtb rtd rte rto rtp rtr rtt taa tab tad tae tah tao tap tar tat tba tbb tbd tbe tbh tbo tbp tbr tbt tda tdb tdd tde tdh tdo tdp tdr tdt te- tea teb ted tee teh teo tep ter tet th- tha thb thd the thh tho thp thr tht to- toa tob tod toe toh too top tor tot tpa tpb tpd tpe tph tpo tpp tpr tpt tra trb trd tre trh tro trp trr trt tta ttb ttd tte tth tto ttp ttr ttt