-er -ic -th a-a a-b a-c a-i a-t aaa aab aac aae aah aai aao aar aat ab- aba abb abc abe abh abi abo abr abt ac- aca acb acc ace ach aci aco acr act aea aeb aec aee aeh aei aeo aer aet aha ahb ahc ahe ahh ahi aho ahr aht ai- aia aib aic aie aih aii aio air ait aoa aob aoc aoe aoh aoi aoo aor aot ar- ara arb arc are arh ari aro arr art at- ata atb atc ate ath ati ato atr att baa bab bac bae bah bai bao bar bat bba bbb bbc bbe bbh bbi bbo bbr bbt bca bcb bcc bce bch bci bco bcr bct be- bea beb bec bee beh bei beo ber bet bha bhb bhc bhe bhh bhi bho bhr bht bi- bia bib bic bie bih bii bio bir bit boa bob boc boe boh boi boo bor bot bra brb bre brh bri bro brr brt bta btb btc bte bth bti bto btr btt c-- caa cab cac cae cah cai cao car cat cba cbb cbc cbe cbh cbi cbo cbr cbt cca ccb ccc cce cch cci cco ccr cct ce- cea ceb cec cee ceh cei ceo cer cet ch- cha chb chc che chh chi cho chr cht ci- cia cib cic cie cih cii cio cir cit co- coa cob coc coe coh coi coo cor cot cra crb crc cre crh cri cro crr crt cta ctb ctc cte cth cti cto ctr ctt eaa eab eac eae eah eai eao ear eat eba ebb ebc ebe ebh ebi ebo ebr ebt ec- eca ecb ecc ece ech eci eco ecr ect eea eeb eec eee eeo eer eet eha ehb ehc ehe ehh ehi eho ehr eht eia eib eic eie eii eio eir eit eo- eoa eob eoc eoe eoh eoi eoo eor eot era erb erc ere erh eri ero err ert eta etb etc ete eth eti eto etr ett h-i haa hab hac hae hah hai hao har hat hba hbb hbc hbe hbh hbi hbo hbr hbt hca hcb hcc hce hch hci hco hcr hct he- hea heb hec hee heh hei heo her het hha hhb hhc hhe hhh hhi hho hhr hht hia hib hic hie hih hii hio hir hit hoa hob hoc hoe hoh hoi hoo hor hot hr- hra hrb hrc hre hrh hri hro hrr hrt hta htb htc hte hth hti hto htr htt ia- iaa iab iac iae iah iai iao iar iat iba ibb ibc ibe ibh ibi ibo ibr ibt ica icb icc ice ich ici ico icr ict ie- iea iec iee iei ier iet iha ihb ihc ihe ihh ihi iho ihr iht iia iib iic iie iih iii iio iir iit io- ioa iob ioc ioe ioh ioi ioo ior iot ir- ira irb irc ire iri iro irr irt ita itb itc ite ith iti ito itt o-i oaa oab oac oae oah oai oao oar oat ob- oba obb obc obe obh obi obo obr obt oc- oca ocb occ och oci oco ocr oct oea oeb oec oee oeh oei oeo oer oet oha ohc ohe ohh ohi oho ohr oht oia oib oic oie oii oio oir oit oo- ooa oob ooc ooh ooi ooo oor oot or- ora orb orc ore orh ori oro orr ort ot- ota otb otc ote oth oti oto otr ott ra- raa rab rac rae rah rai rao rar rat rba rbb rbc rbe rbh rbi rbo rbr rbt rca rcb rcc rce rch rci rco rcr rct re- rea reb rec ree reh rei reo rer ret rh- rha rhb rhc rhe rhh rhi rho rhr rht ria rib ric rie rih rii rio rir rit roa rob roc roe roh roi roo ror rot rra rrb rrc rrh rri rrr rrt rta rtb rtc rte rti rto rtr rtt taa tab tac tae tah tai tao tar tat tba tbb tbc tbe tbh tbi tbo tbr tbt tca tcb tcc tce tch tci tco tcr tct te- tea teb tec tee teh tei teo ter tet th- tha thb thc the thh thi tho thr tht tia tib tic tie tih tii tio tir tit to- toa tob toc toe toh toi too tor tot tra trb trc tre trh tri tro trr trt tta ttb ttc tte tth tti tto ttr ttt