-er a-a a-b a-i a-t aaa aab aad aae aai aap aar aat ab- aba abb abd abe abi abp abr abt ad- ada adb add ade adi adp adr adt aea aeb aed aee aei aep aer aet ai- aia aib aid aie aii aip air ait ap- apa apb apd ape api app apr apt ar- ara arb ard are ari arp arr art at- ata atb atd ate ati atp atr att b-p baa bab bad bae bai bap bar bat bba bbb bbd bbe bbi bbp bbr bbt bda bdb bdd bde bdi bdp bdr bdt be- bea beb bed bee bei bep ber bet bi- bia bib bid bie bii bip bir bit bpa bpb bpd bpe bpi bpp bpr bpt bra brb brd bre bri brp brr brt bta btb btd bte bti btp btr btt daa dab dad dae dai dap dar dat dba dbb dbd dbe dbi dbp dbr dbt dda ddb ddd dde ddi ddp ddr ddt de- dea deb ded dee dei dep der det di- dia dib did die dii dip dir dit dpa dpb dpd dpe dpi dpp dpr dpt dra drb drd dre dri drp drr drt dta dtb dtd dte dti dtp dtr dtt eaa eab ead eae eai eap ear eat eba ebb ebd ebe ebi ebp ebr ebt ed- eda edb edd ede edi edp edr edt eea eeb eed eee eep eer eet eia eib eid eie eii eip eir eit ep- epa epb epd epe epi epp epr ept era erb erd ere eri erp err ert eta etb etd ete eti etp etr ett i-d ia- iaa iab iad iae iai iap iar iat iba ibb ibd ibe ibi ibp ibr ibt ida idb idd ide idi idp idr idt ie- iea ied iee iei iep ier iet iia iib iid iie iii iip iir iit ipa ipb ipd ipe ipi ipp ipr ipt ir- ira irb ird ire iri irp irr irt ita itb itd ite iti itp itt p-p paa pab pad pae pai pap par pat pba pbb pbd pbe pbi pbp pbr pbt pda pdb pdd pde pdi pdp pdr pdt pea peb ped pee pei pep per pet pia pib pid pie pii pip pir pit ppa ppb ppd ppe ppi ppp ppr ppt pra prb prd pre pri prp prr prt pt- pta ptb ptd pte pti ptp ptr ptt ra- raa rab rad rae rai rap rar rat rba rbb rbd rbe rbi rbp rbr rbt rda rdb rdd rde rdi rdp rdr rdt re- rea reb red ree rei rep rer ret ria rib rid rie rii rip rir rit rpa rpb rpd rpe rpi rpp rpr rpt rra rrb rrd rri rrp rrr rrt rta rtb rtd rte rti rtp rtr rtt taa tab tad tae tai tap tar tat tba tbb tbd tbe tbi tbp tbr tbt tda tdb tdd tde tdi tdp tdr tdt te- tea teb ted tee tei tep ter tet tia tib tid tie tii tip tir tit tpa tpb tpd tpe tpi tpp tpr tpt tra trb trd tre tri trp trr trt tta ttb ttd tte tti ttp ttr ttt