-ic -th a-a a-b a-c a-i a-t aaa aab aac aah aai aao aat aay ab- aba abb abc abh abi abo abt aby ac- aca acb acc ach aci aco act acy aha ahb ahc ahh ahi aho aht ahy ai- aia aib aic aih aii aio ait aiy aoa aob aoc aoh aoi aoo aot at- ata atb atc ath ati ato att ay- aya ayc ayh ayi ayo ayt baa bab bac bah bai bao bat bay bba bbb bbc bbh bbi bbo bbt bby bca bcb bcc bch bci bco bct bcy bha bhb bhc bhh bhi bho bht bi- bia bib bic bih bii bio bit biy boa bob boc boh boi boo bot boy bta btb btc bth bti bto btt bty by- bya byc byh byi byo byt c-- caa cab cac cah cai cao cat cay cba cbb cbc cbh cbi cbo cbt cby cca ccb ccc cch cci cco cct ch- cha chb chc chh chi cho cht chy ci- cia cib cic cih cii cio cit co- coa cob coc coh coi coo cot coy cta ctb ctc cth cti cto ctt cty cya cyb cyc cyo cyt h-i haa hab hac hah hai hao hat hay hba hbb hbc hbh hbi hbo hbt hby hca hcb hcc hch hci hco hct hcy hha hhb hhc hhh hhi hho hht hhy hia hib hic hih hii hio hit hoa hob hoc hoh hoi hoo hot hoy hta htb htc hth hti hto htt hty hy- hya hyb hyc hyh hyi hyo hyt hyy ia- iaa iab iac iah iai iao iat iba ibb ibc ibh ibi ibo ibt iby ica icb icc ich ici ico ict icy iha ihb ihc ihh ihi iho iht ihy iia iib iic iih iii iio iit io- ioa iob ioc ioh ioi ioo iot ita itb itc ith iti ito itt ity iya iyc iyo iyt iyy o-i oaa oab oac oah oai oao oat ob- oba obb obc obh obi obo obt oby oc- oca ocb occ och oci oco oct oha ohc ohh ohi oho oht oia oib oic oii oio oit oo- ooa oob ooc ooh ooi ooo oot ot- ota otb otc oth oti oto ott oya oyi oyo taa tab tac tah tai tao tat tay tba tbb tbc tbh tbi tbo tbt tca tcb tcc tch tci tco tct th- tha thb thc thh thi tho tht thy tia tib tic tih tii tio tit tiy to- toa tob toc toh toi too tot toy tta ttb ttc tth tti tto ttt tty tya tyc tyo tyt yaa yab yac yah yai yao yat yay ybc ybi yby yca ycc ych yci yco ycy yha yhc yhi yht yih yii yio yit yob yoc yoi yoo yot yoy yta ytc yth yto ytt yyb yyc yyt yyy