-er -th a-a a-b a-c a-t aaa aab aac aae aah aao aap aar aat ab- aba abb abc abe abh abo abp abr abt ac- aca acb acc ace ach aco acp acr act aea aeb aec aee aeh aeo aep aer aet aha ahb ahc ahe ahh aho ahp ahr aht aoa aob aoc aoe aoh aoo aop aor aot ap- apa apb apc ape aph apo app apr apt ar- ara arb arc are arh aro arp arr art at- ata atb atc ate ath ato atp atr att b-p baa bab bac bae bah bao bap bar bat bba bbb bbc bbe bbh bbo bbp bbr bbt bca bcb bcc bce bch bco bcp bcr bct be- bea beb bec bee beh beo bep ber bet bha bhb bhc bhe bhh bho bhp bhr bht boa bob boc boe boh boo bop bor bot bpa bpb bpc bpe bph bpo bpp bpr bpt bra brb bre brh bro brp brr brt bta btb btc bte bth bto btp btr btt c-- caa cab cac cae cah cao cap car cat cba cbb cbc cbe cbh cbo cbp cbr cbt cca ccb ccc cce cch cco ccp ccr cct ce- cea ceb cec cee ceh ceo cep cer cet ch- cha chb chc che chh cho chp chr cht co- coa cob coc coe coh coo cop cor cot cpa cpb cpc cpe cph cpo cpp cpr cpt cra crb crc cre crh cro crp crr crt cta ctb ctc cte cth cto ctp ctr ctt eaa eab eac eae eah eao eap ear eat eba ebb ebc ebe ebh ebo ebp ebr ebt ec- eca ecb ecc ece ech eco ecr ect eea eeb eec eee eeo eep eer eet eha ehb ehc ehe ehh eho ehp ehr eht eo- eoa eob eoc eoe eoh eoo eop eor eot ep- epa epb epc epe eph epo epp epr ept era erb erc ere erh ero erp err ert eta etb etc ete eth eto etp etr ett haa hab hac hae hah hao hap har hat hba hbb hbc hbe hbh hbo hbp hbr hbt hca hcb hcc hce hch hco hcp hcr hct he- hea heb hec hee heh heo hep her het hha hhb hhc hhe hhh hho hhp hhr hht hoa hob hoc hoe hoh hoo hop hor hot hpa hpb hpc hpe hph hpo hpp hpr hpt hr- hra hrb hrc hre hrh hro hrp hrr hrt hta htb htc hte hth hto htp htr htt oaa oab oac oae oah oao oap oar oat ob- oba obb obc obe obh obo obp obr obt oc- oca ocb occ och oco ocp ocr oct oea oeb oec oee oeh oeo oep oer oet oha ohc ohe ohh oho ohp ohr oht oo- ooa oob ooc ooh ooo oop oor oot op- opa opb opc ope oph opo opp opr opt or- ora orb orc ore orh oro orp orr ort ot- ota otb otc ote oth oto otp otr ott p-p paa pab pac pae pah pao pap par pat pba pbb pbc pbe pbo pbp pbr pbt pca pcb pcc pce pch pco pcp pcr pct pea peb pec pee peh peo pep per pet pha phb phc phe pho php phr pht poa pob poc poe poh poo pop por pot ppa ppb ppc ppe pph ppo ppp ppr ppt pra prb prc pre prh pro prp prr prt pt- pta ptb ptc pte pth pto ptp ptr ptt ra- raa rab rac rae rah rao rap rar rat rba rbb rbc rbe rbh rbo rbp rbr rbt rca rcb rcc rce rch rco rcp rcr rct re- rea reb rec ree reh reo rep rer ret rh- rha rhb rhc rhe rhh rho rhp rhr rht roa rob roc roe roh roo rop ror rot rpa rpb rpc rpe rph rpo rpp rpr rpt rra rrb rrc rrh rrp rrr rrt rta rtb rtc rte rto rtp rtr rtt taa tab tac tae tah tao tap tar tat tba tbb tbc tbe tbh tbo tbp tbr tbt tca tcb tcc tce tch tco tcp tcr tct te- tea teb tec tee teh teo tep ter tet th- tha thb thc the thh tho thp thr tht to- toa tob toc toe toh too top tor tot tpa tpb tpc tpe tph tpo tpp tpr tpt tra trb trc tre trh tro trp trr trt tta ttb ttc tte tth tto ttp ttr ttt