-er -th a-a a-b a-t aaa aab aae aah aan aao aap aar aat ab- aba abb abe abh abn abo abp abr abt aea aeb aee aeh aen aeo aep aer aet aha ahb ahe ahh ahn aho ahp ahr aht an- ana anb ane anh ann ano anp anr ant aoa aob aoe aoh aon aoo aop aor aot ap- apa apb ape aph apn apo app apr apt ar- ara arb are arh arn aro arp arr art at- ata atb ate ath atn ato atp atr att b-p baa bab bae bah ban bao bap bar bat bba bbb bbe bbh bbn bbo bbp bbr bbt be- bea beb bee beh ben beo bep ber bet bha bhb bhe bhh bho bhp bhr bht bna bnb bne bnn bno bnp bnr bnt boa bob boe boh bon boo bop bor bot bpa bpb bpe bph bpn bpo bpp bpr bpt bra brb bre brh brn bro brp brr brt bta btb bte bth btn bto btp btr btt eaa eab eae eah ean eao eap ear eat eba ebb ebe ebh ebn ebo ebp ebr ebt eea eeb eee een eeo eep eer eet eha ehb ehe ehh ehn eho ehp ehr eht en- ena enb ene enh enn eno enp enr ent eo- eoa eob eoe eoh eon eoo eop eor eot ep- epa epb epe eph epn epo epp epr ept era erb ere erh ern ero erp err ert eta etb ete eth etn eto etp etr ett haa hab hae hah han hao hap har hat hba hbb hbe hbh hbn hbo hbp hbr hbt he- hea heb hee heh hen heo hep her het hha hhb hhe hhh hhn hho hhp hhr hht hna hnb hne hnh hnn hno hnt hoa hob hoe hoh hon hoo hop hor hot hpa hpb hpe hph hpn hpo hpp hpr hpt hr- hra hrb hre hrh hrn hro hrp hrr hrt hta htb hte hth htn hto htp htr htt naa nab nae nah nan nao nap nar nat nba nbb nbe nbn nbo nbp nbr nbt ne- nea neb nee neh nen neo nep ner net nha nhb nhe nhh nhn nhp nhr nht nna nnb nne nnh nnn nno nnp nnt no- noa nob noe noh non noo nop nor not npa npb npe nph npn npo npp npr npt nra nrb nre nrn nro nrp nrr nrt nta ntb nte nth ntn nto ntp ntr ntt oaa oab oae oah oan oao oap oar oat ob- oba obb obe obh obn obo obp obr obt oea oeb oee oeh oen oeo oep oer oet oha ohe ohh ohn oho ohp ohr oht on- ona onb one onh onn ono onp onr ont oo- ooa oob ooh oon ooo oop oor oot op- opa opb ope oph opn opo opp opr opt or- ora orb ore orh orn oro orp orr ort ot- ota otb ote oth otn oto otp otr ott p-p paa pab pae pah pan pao pap par pat pba pbb pbe pbn pbo pbp pbr pbt pea peb pee peh pen peo pep per pet pha phb phe phn pho php phr pht pn- pna pnb pne pnh pnn pno pnp pnr pnt poa pob poe poh pon poo pop por pot ppa ppb ppe pph ppn ppo ppp ppr ppt pra prb pre prh prn pro prp prr prt pt- pta ptb pte pth ptn pto ptp ptr ptt ra- raa rab rae rah ran rao rap rar rat rba rbb rbe rbh rbn rbo rbp rbr rbt re- rea reb ree reh ren reo rep rer ret rh- rha rhb rhe rhh rhn rho rhp rhr rht rna rnb rnh rnn rno rnp rnr rnt roa rob roe roh ron roo rop ror rot rpa rpb rpe rph rpn rpo rpp rpr rpt rra rrb rrh rrn rrp rrr rrt rta rtb rte rtn rto rtp rtr rtt taa tab tae tah tan tao tap tar tat tba tbb tbe tbh tbn tbo tbp tbr tbt te- tea teb tee teh ten teo tep ter tet th- tha thb the thh thn tho thp thr tht tna tnb tne tnh tnn tno tnp tnr tnt to- toa tob toe toh ton too top tor tot tpa tpb tpe tph tpn tpo tpp tpr tpt tra trb tre trh trn tro trp trr trt tta ttb tte tth ttn tto ttp ttr ttt