-er -ic -th a-a a-c a-i a-t aaa aac aae aag aah aai aao aar aat ac- aca acc ace acg ach aci aco acr act aea aec aee aeg aeh aei aeo aer aet ag- aga agc age agg agh agi ago agr agt aha ahc ahe ahg ahh ahi aho ahr aht ai- aia aic aie aig aih aii aio air ait aoa aoc aoe aog aoh aoi aoo aor aot ar- ara arc are arg arh ari aro arr art at- ata atc ate atg ath ati ato atr att c-- caa cac cae cag cah cai cao car cat cca ccc cce ccg cch cci cco ccr cct ce- cea cec cee ceg ceh cei ceo cer cet cga cgc cge cgg cgh cgi cgo cgr cgt ch- cha chc che chg chh chi cho chr cht ci- cia cic cie cig cih cii cio cir cit co- coa coc coe cog coh coi coo cor cot cra crc cre crg crh cri cro crr crt cta ctc cte ctg cth cti cto ctr ctt eaa eac eae eag eah eai eao ear eat ec- eca ecc ece ecg ech eci eco ecr ect eea eec eee eeg eeo eer eet ega egc ege egg egh egi ego egr egt eha ehc ehe ehg ehh ehi eho ehr eht eia eic eie eig eii eio eir eit eo- eoa eoc eoe eog eoh eoi eoo eor eot era erc ere erg erh eri ero err ert eta etc ete etg eth eti eto etr ett gaa gac gae gag gah gai gao gar gat gca gcc gce gcg gch gci gco gcr gct ge- gea gec gee geg geh gei geo ger get gga ggc ggg ggh ggi ggo ggr ggt gha ghc ghe ghg ghh ghi gho ghr ght gia gic gie gig gih gii gio gir git goa goc goe gog goh goi goo gor got gra grc gre grg grh gri gro grr grt gta gtc gte gtg gth gti gto gtr gtt h-i haa hac hae hag hah hai hao har hat hca hcc hce hcg hch hci hco hcr hct he- hea hec hee heg heh hei heo her het hga hgc hge hgg hgh hgi hgo hgr hgt hha hhc hhe hhg hhh hhi hho hhr hht hia hic hie hig hih hii hio hir hit hoa hoc hoe hog hoh hoi hoo hor hot hr- hra hrc hre hrg hrh hri hro hrr hrt hta htc hte htg hth hti hto htr htt ia- iaa iac iae iag iah iai iao iar iat ica icc ice icg ich ici ico icr ict ie- iea iec iee ieg iei ier iet iga igc ige igg igh igi igo igr igt iha ihc ihe ihg ihh ihi iho ihr iht iia iic iie iih iii iio iir iit io- ioa ioc ioe iog ioh ioi ioo ior iot ir- ira irc ire irg iri iro irr irt ita itc ite itg ith iti ito itt o-i oaa oac oae oag oah oai oao oar oat oc- oca occ ocg och oci oco ocr oct oea oec oee oeg oeh oei oeo oer oet oga ogc oge ogg ogh ogi ogo ogt oha ohc ohe ohg ohh ohi oho ohr oht oia oic oie oii oio oir oit oo- ooa ooc oog ooh ooi ooo oor oot or- ora orc ore org orh ori oro orr ort ot- ota otc ote otg oth oti oto otr ott ra- raa rac rae rag rah rai rao rar rat rca rcc rce rcg rch rci rco rcr rct re- rea rec ree reg reh rei reo rer ret rga rgc rge rgg rgh rgi rgo rgr rgt rh- rha rhc rhe rhg rhh rhi rho rhr rht ria ric rie rig rih rii rio rir rit roa roc roe rog roh roi roo ror rot rra rrc rrg rrh rri rrr rrt rta rtc rte rtg rti rto rtr rtt taa tac tae tag tah tai tao tar tat tca tcc tce tcg tch tci tco tcr tct te- tea tec tee teg teh tei teo ter tet tga tgc tge tgg tgh tgi tgo tgr tgt th- tha thc the thg thh thi tho thr tht tia tic tie tig tih tii tio tir tit to- toa toc toe tog toh toi too tor tot tra trc tre trg trh tri tro trr trt tta ttc tte ttg tth tti tto ttr ttt