-th a-a a-b a-c a-t aaa aab aac aad aah aao aar aat aay ab- aba abb abc abd abh abo abr abt aby ac- aca acb acc acd ach aco acr act acy ad- ada adb adc add adh ado adr adt ady aha ahb ahc ahd ahh aho ahr aht ahy aoa aob aoc aod aoh aoo aor aot ar- ara arb arc ard arh aro arr art ary at- ata atb atc atd ath ato atr att ay- aya ayc ayd ayh ayo ayr ayt baa bab bac bad bah bao bar bat bay bba bbb bbc bbd bbh bbo bbr bbt bby bca bcb bcc bcd bch bco bcr bct bcy bda bdb bdc bdd bdh bdo bdr bdt bdy bha bhb bhc bhd bhh bho bhr bht boa bob boc bod boh boo bor bot boy bra brb brd brh bro brr brt bry bta btb btc btd bth bto btr btt bty by- bya byc byd byh byo byr byt c-- caa cab cac cad cah cao car cat cay cba cbb cbc cbd cbh cbo cbr cbt cby cca ccb ccc ccd cch cco ccr cct cda cdb cdc cdd cdh cdo cdr cdt cdy ch- cha chb chc chd chh cho chr cht chy co- coa cob coc cod coh coo cor cot coy cra crb crc crd crh cro crr crt cry cta ctb ctc ctd cth cto ctr ctt cty cya cyb cyc cyd cyo cyr cyt daa dab dac dad dah dao dar dat day dba dbb dbc dbd dbh dbo dbr dbt dby dca dcb dcc dcd dco dcr dct dda ddb ddc ddd ddh ddo ddr ddt ddy dh- dha dhb dhc dhd dhh dho dhr dht doa dob doc dod doh doo dor dot doy dra drb drc drd dro drr drt dry dta dtb dtc dtd dth dto dtr dtt dty dy- dya dyb dyc dyd dyo dyr dyy haa hab hac had hah hao har hat hay hba hbb hbc hbd hbh hbo hbr hbt hby hca hcb hcc hcd hch hco hcr hct hcy hda hdb hdc hdd hdh hdo hdr hdt hdy hha hhb hhc hhd hhh hho hhr hht hhy hoa hob hoc hod hoh hoo hor hot hoy hr- hra hrb hrc hrd hrh hro hrr hrt hta htb htc htd hth hto htr htt hty hy- hya hyb hyc hyd hyh hyo hyr hyt hyy oaa oab oac oad oah oao oar oat ob- oba obb obc obd obh obo obr obt oby oc- oca ocb occ ocd och oco ocr oct oda odb odc odd odh odo odr odt oha ohc ohd ohh oho ohr oht oo- ooa oob ooc ood ooh ooo oor oot or- ora orb orc ord orh oro orr ort ory ot- ota otb otc otd oth oto otr ott oya oyd oyo ra- raa rab rac rad rah rao rar rat ray rba rbb rbc rbd rbh rbo rbr rbt rca rcb rcc rcd rch rco rcr rct rda rdb rdc rdd rdh rdo rdr rdt rdy rh- rha rhb rhc rhd rhh rho rhr rht roa rob roc rod roh roo ror rot roy rra rrb rrc rrd rrh rrr rrt rta rtb rtc rtd rto rtr rtt rty ry- rya ryc ryd ryo ryr ryy taa tab tac tad tah tao tar tat tay tba tbb tbc tbd tbh tbo tbr tbt tca tcb tcc tcd tch tco tcr tct tda tdb tdc tdd tdh tdo tdr tdt tdy th- tha thb thc thd thh tho thr tht thy to- toa tob toc tod toh too tor tot toy tra trb trc trd trh tro trr trt try tta ttb ttc ttd tth tto ttr ttt tty tya tyc tyd tyo tyr tyt yaa yab yac yad yah yao yar yat yay ybc ybr yby yca ycc ycd ych yco ycy yda ydo ydt ydy yha yhc yht yob yoc yod yoo yor yot yoy yra yrc yro yrt yta ytc ytd yth yto ytr ytt yyb yyc yyt yyy