-er -ic -th a-a a-b a-c a-i a-t aaa aab aac aae aag aah aai aar aat ab- aba abb abc abe abg abh abi abr abt ac- aca acb acc ace acg ach aci acr act aea aeb aec aee aeg aeh aei aer aet ag- aga agb agc age agg agh agi agr agt aha ahb ahc ahe ahg ahh ahi ahr aht ai- aia aib aic aie aig aih aii air ait ar- ara arb arc are arg arh ari arr art at- ata atb atc ate atg ath ati atr att baa bab bac bae bag bah bai bar bat bba bbb bbc bbe bbg bbh bbi bbr bbt bca bcb bcc bce bcg bch bci bcr bct be- bea beb bec bee beg beh bei ber bet bga bgb bgc bge bgg bgh bgi bgr bgt bha bhb bhc bhe bhg bhh bhi bhr bht bi- bia bib bic bie big bih bii bir bit bra brb bre brg brh bri brr brt bta btb btc bte btg bth bti btr btt c-- caa cab cac cae cag cah cai car cat cba cbb cbc cbe cbg cbh cbi cbr cbt cca ccb ccc cce ccg cch cci ccr cct ce- cea ceb cec cee ceg ceh cei cer cet cga cgb cgc cge cgg cgh cgi cgr cgt ch- cha chb chc che chg chh chi chr cht ci- cia cib cic cie cig cih cii cir cit cra crb crc cre crg crh cri crr crt cta ctb ctc cte ctg cth cti ctr ctt eaa eab eac eae eag eah eai ear eat eba ebb ebc ebe ebg ebh ebi ebr ebt ec- eca ecb ecc ece ecg ech eci ecr ect eea eeb eec eee eeg eer eet ega egb egc ege egg egh egi egr egt eha ehb ehc ehe ehg ehh ehi ehr eht eia eib eic eie eig eii eir eit era erb erc ere erg erh eri err ert eta etb etc ete etg eth eti etr ett gaa gab gac gae gag gah gai gar gat gba gbc gbe gbg gbh gbi gbr gbt gca gcb gcc gce gcg gch gci gcr gct ge- gea geb gec gee geg geh gei ger get gga ggb ggc ggg ggh ggi ggr ggt gha ghb ghc ghe ghg ghh ghi ghr ght gia gib gic gie gig gih gii gir git gra grb grc gre grg grh gri grr grt gta gtb gtc gte gtg gth gti gtr gtt h-i haa hab hac hae hag hah hai har hat hba hbb hbc hbe hbg hbh hbi hbr hbt hca hcb hcc hce hcg hch hci hcr hct he- hea heb hec hee heg heh hei her het hga hgb hgc hge hgg hgh hgi hgr hgt hha hhb hhc hhe hhg hhh hhi hhr hht hia hib hic hie hig hih hii hir hit hr- hra hrb hrc hre hrg hrh hri hrr hrt hta htb htc hte htg hth hti htr htt ia- iaa iab iac iae iag iah iai iar iat iba ibb ibc ibe ibg ibh ibi ibr ibt ica icb icc ice icg ich ici icr ict ie- iea iec iee ieg iei ier iet iga igb igc ige igg igh igi igr igt iha ihb ihc ihe ihg ihh ihi ihr iht iia iib iic iie iih iii iir iit ir- ira irb irc ire irg iri irr irt ita itb itc ite itg ith iti itt ra- raa rab rac rae rag rah rai rar rat rba rbb rbc rbe rbg rbh rbi rbr rbt rca rcb rcc rce rcg rch rci rcr rct re- rea reb rec ree reg reh rei rer ret rga rgb rgc rge rgg rgh rgi rgr rgt rh- rha rhb rhc rhe rhg rhh rhi rhr rht ria rib ric rie rig rih rii rir rit rra rrb rrc rrg rrh rri rrr rrt rta rtb rtc rte rtg rti rtr rtt taa tab tac tae tag tah tai tar tat tba tbb tbc tbe tbg tbh tbi tbr tbt tca tcb tcc tce tcg tch tci tcr tct te- tea teb tec tee teg teh tei ter tet tga tgb tgc tge tgg tgh tgi tgr tgt th- tha thb thc the thg thh thi thr tht tia tib tic tie tig tih tii tir tit tra trb trc tre trg trh tri trr trt tta ttb ttc tte ttg tth tti ttr ttt