-er -th a-a a-b a-i a-t aaa aab aae aag aah aai aao aar aat ab- aba abb abe abg abh abi abo abr abt aea aeb aee aeg aeh aei aeo aer aet ag- aga agb age agg agh agi ago agr agt aha ahb ahe ahg ahh ahi aho ahr aht ai- aia aib aie aig aih aii aio air ait aoa aob aoe aog aoh aoi aoo aor aot ar- ara arb are arg arh ari aro arr art at- ata atb ate atg ath ati ato atr att baa bab bae bag bah bai bao bar bat bba bbb bbe bbg bbh bbi bbo bbr bbt be- bea beb bee beg beh bei beo ber bet bga bgb bge bgg bgh bgi bgo bgr bgt bha bhb bhe bhg bhh bhi bho bhr bht bi- bia bib bie big bih bii bio bir bit boa bob boe bog boh boi boo bor bot bra brb bre brg brh bri bro brr brt bta btb bte btg bth bti bto btr btt eaa eab eae eag eah eai eao ear eat eba ebb ebe ebg ebh ebi ebo ebr ebt eea eeb eee eeg eeo eer eet ega egb ege egg egh egi ego egr egt eha ehb ehe ehg ehh ehi eho ehr eht eia eib eie eig eii eio eir eit eo- eoa eob eoe eog eoh eoi eoo eor eot era erb ere erg erh eri ero err ert eta etb ete etg eth eti eto etr ett gaa gab gae gag gah gai gao gar gat gba gbe gbg gbh gbi gbo gbr gbt ge- gea geb gee geg geh gei geo ger get gga ggb ggg ggh ggi ggo ggr ggt gha ghb ghe ghg ghh ghi gho ghr ght gia gib gie gig gih gii gio gir git goa gob goe gog goh goi goo gor got gra grb gre grg grh gri gro grr grt gta gtb gte gtg gth gti gto gtr gtt h-i haa hab hae hag hah hai hao har hat hba hbb hbe hbg hbh hbi hbo hbr hbt he- hea heb hee heg heh hei heo her het hga hgb hge hgg hgh hgi hgo hgr hgt hha hhb hhe hhg hhh hhi hho hhr hht hia hib hie hig hih hii hio hir hit hoa hob hoe hog hoh hoi hoo hor hot hr- hra hrb hre hrg hrh hri hro hrr hrt hta htb hte htg hth hti hto htr htt ia- iaa iab iae iag iah iai iao iar iat iba ibb ibe ibg ibh ibi ibo ibr ibt ie- iea iee ieg iei ier iet iga igb ige igg igh igi igo igr igt iha ihb ihe ihg ihh ihi iho ihr iht iia iib iie iih iii iio iir iit io- ioa iob ioe iog ioh ioi ioo ior iot ir- ira irb ire irg iri iro irr irt ita itb ite itg ith iti ito itt o-i oaa oab oae oag oah oai oao oar oat ob- oba obb obe obg obh obi obo obr obt oea oeb oee oeg oeh oei oeo oer oet oga oge ogg ogh ogi ogo ogt oha ohe ohg ohh ohi oho ohr oht oia oib oie oii oio oir oit oo- ooa oob oog ooh ooi ooo oor oot or- ora orb ore org orh ori oro orr ort ot- ota otb ote otg oth oti oto otr ott ra- raa rab rae rag rah rai rao rar rat rba rbb rbe rbg rbh rbi rbo rbr rbt re- rea reb ree reg reh rei reo rer ret rga rgb rge rgg rgh rgi rgo rgr rgt rh- rha rhb rhe rhg rhh rhi rho rhr rht ria rib rie rig rih rii rio rir rit roa rob roe rog roh roi roo ror rot rra rrb rrg rrh rri rrr rrt rta rtb rte rtg rti rto rtr rtt taa tab tae tag tah tai tao tar tat tba tbb tbe tbg tbh tbi tbo tbr tbt te- tea teb tee teg teh tei teo ter tet tga tgb tge tgg tgh tgi tgo tgr tgt th- tha thb the thg thh thi tho thr tht tia tib tie tig tih tii tio tir tit to- toa tob toe tog toh toi too tor tot tra trb tre trg trh tri tro trr trt tta ttb tte ttg tth tti tto ttr ttt