-er -th a-a a-b a-i a-t aaa aab aae aah aai aao aar aat ab- aba abb abe abh abi abo abr abt aea aeb aee aeh aei aeo aer aet aha ahb ahe ahh ahi aho ahr aht ai- aia aib aie aih aii aio air ait aoa aob aoe aoh aoi aoo aor aot ar- ara arb are arh ari aro arr art at- ata atb ate ath ati ato atr att baa bab bae bah bai bao bar bat bba bbb bbe bbh bbi bbo bbr bbt be- bea beb bee beh bei beo ber bet bha bhb bhe bhh bhi bho bhr bht bi- bia bib bie bih bii bio bir bit boa bob boe boh boi boo bor bot bra brb bre brh bri bro brr brt bta btb bte bth bti bto btr btt eaa eab eae eah eai eao ear eat eba ebb ebe ebh ebi ebo ebr ebt eea eeb eee eeo eer eet eha ehb ehe ehh ehi eho ehr eht eia eib eie eii eio eir eit eo- eoa eob eoe eoh eoi eoo eor eot era erb ere erh eri ero err ert eta etb ete eth eti eto etr ett h-i haa hab hae hah hai hao har hat hba hbb hbe hbh hbi hbo hbr hbt he- hea heb hee heh hei heo her het hha hhb hhe hhh hhi hho hhr hht hia hib hie hih hii hio hir hit hoa hob hoe hoh hoi hoo hor hot hr- hra hrb hre hrh hri hro hrr hrt hta htb hte hth hti hto htr htt ia- iaa iab iae iah iai iao iar iat iba ibb ibe ibh ibi ibo ibr ibt ie- iea iee iei ier iet iha ihb ihe ihh ihi iho ihr iht iia iib iie iih iii iio iir iit io- ioa iob ioe ioh ioi ioo ior iot ir- ira irb ire iri iro irr irt ita itb ite ith iti ito itt o-i oaa oab oae oah oai oao oar oat ob- oba obb obe obh obi obo obr obt oea oeb oee oeh oei oeo oer oet oha ohe ohh ohi oho ohr oht oia oib oie oii oio oir oit oo- ooa oob ooh ooi ooo oor oot or- ora orb ore orh ori oro orr ort ot- ota otb ote oth oti oto otr ott ra- raa rab rae rah rai rao rar rat rba rbb rbe rbh rbi rbo rbr rbt re- rea reb ree reh rei reo rer ret rh- rha rhb rhe rhh rhi rho rhr rht ria rib rie rih rii rio rir rit roa rob roe roh roi roo ror rot rra rrb rrh rri rrr rrt rta rtb rte rti rto rtr rtt taa tab tae tah tai tao tar tat tba tbb tbe tbh tbi tbo tbr tbt te- tea teb tee teh tei teo ter tet th- tha thb the thh thi tho thr tht tia tib tie tih tii tio tir tit to- toa tob toe toh toi too tor tot tra trb tre trh tri tro trr trt tta ttb tte tth tti tto ttr ttt