-er -ey -th a-a a-b a-t aaa aab aae aah aao aar aat aay ab- aba abb abe abh abo abr abt aby aea aeb aee aeh aeo aer aet aey aha ahb ahe ahh aho ahr aht ahy aoa aob aoe aoh aoo aor aot ar- ara arb are arh aro arr art ary at- ata atb ate ath ato atr att ay- aya aye ayh ayo ayr ayt baa bab bae bah bao bar bat bay bba bbb bbe bbh bbo bbr bbt bby be- bea beb bee beh beo ber bet bey bha bhb bhe bhh bho bhr bht boa bob boe boh boo bor bot boy bra brb bre brh bro brr brt bry bta btb bte bth bto btr btt bty by- bya bye byh byo byr byt eaa eab eae eah eao ear eat eba ebb ebe ebh ebo ebr ebt eby eea eeb eee eeo eer eet eey eha ehb ehe ehh eho ehr eht eo- eoa eob eoe eoh eoo eor eot era erb ere erh ero err ert ery eta etb ete eth eto etr ett ety eya eye eyo eyr eyt haa hab hae hah hao har hat hay hba hbb hbe hbh hbo hbr hbt hby he- hea heb hee heh heo her het hey hha hhb hhe hhh hho hhr hht hhy hoa hob hoe hoh hoo hor hot hoy hr- hra hrb hre hrh hro hrr hrt hta htb hte hth hto htr htt hty hy- hya hyb hye hyh hyo hyr hyt hyy oaa oab oae oah oao oar oat ob- oba obb obe obh obo obr obt oby oea oeb oee oeh oeo oer oet oey oha ohe ohh oho ohr oht oo- ooa oob ooh ooo oor oot or- ora orb ore orh oro orr ort ory ot- ota otb ote oth oto otr ott oya oye oyo ra- raa rab rae rah rao rar rat ray rba rbb rbe rbh rbo rbr rbt re- rea reb ree reh reo rer ret rey rh- rha rhb rhe rhh rho rhr rht roa rob roe roh roo ror rot roy rra rrb rrh rrr rrt rta rtb rte rto rtr rtt rty ry- rya rye ryo ryr ryy taa tab tae tah tao tar tat tay tba tbb tbe tbh tbo tbr tbt te- tea teb tee teh teo ter tet tey th- tha thb the thh tho thr tht thy to- toa tob toe toh too tor tot toy tra trb tre trh tro trr trt try tta ttb tte tth tto ttr ttt tty tya tye tyo tyr tyt yaa yab yae yah yao yar yat yay ybe ybr yby yea yeb yee yeh yeo yer yet yey yha yhe yht yob yoe yoo yor yot yoy yra yre yro yrt yta yte yth yto ytr ytt yyb yye yyt yyy