-er a-a a-i aaa aad aae aai aao aap aar aax ad- ada add ade adi ado adp adr adx aea aed aee aei aeo aep aer aex ai- aia aid aie aii aio aip air aix aoa aod aoe aoi aoo aop aor aox ap- apa apd ape api apo app apr apx ar- ara ard are ari aro arp arr arx ax- axa axe axi axo axp axr axx daa dad dae dai dao dap dar dax dda ddd dde ddi ddo ddp ddr ddx de- dea ded dee dei deo dep der dex di- dia did die dii dio dip dir dix doa dod doe doi doo dop dor dox dpa dpd dpe dpi dpo dpp dpr dra drd dre dri dro drp drr drx dxd dxi dxo dxp dxr dxx eaa ead eae eai eao eap ear eax ed- eda edd ede edi edo edp edr edx eea eed eee eeo eep eer eex eia eid eie eii eio eip eir eix eo- eoa eod eoe eoi eoo eop eor ep- epa epd epe epi epo epp epr epx era erd ere eri ero erp err ex- exa exd exe exi exo exp exr exx i-d ia- iaa iad iae iai iao iap iar ida idd ide idi ido idp idr idx ie- iea ied iee iei iep ier iex iia iid iie iii iio iip iir iix io- ioa iod ioe ioi ioo iop ior ipa ipd ipe ipi ipo ipp ipr ipx ir- ira ird ire iri iro irp irr irx ixe ixi o-i oaa oad oae oai oao oap oar oax oda odd ode odi odo odp odr oea oed oee oei oeo oep oer oex oia oid oie oii oio oip oir oo- ooa ood ooi ooo oop oor oox op- opa opd ope opi opo opp opr opx or- ora ord ore ori oro orp orr orx ox- oxa oxi oxo oxx p-p paa pad pae pai pao pap par pax pda pdd pde pdi pdo pdp pdr pdx pea ped pee pei peo pep per pex pia pid pie pii pio pip pir pix poa pod poe poi poo pop por pox ppa ppd ppe ppi ppo ppp ppr ppx pra prd pre pri pro prp prr prx pxe pxr ra- raa rad rae rai rao rap rar rax rda rdd rde rdi rdo rdp rdr rdx re- rea red ree rei reo rep rer rex ria rid rie rii rio rip rir rix roa rod roe roi roo rop ror rox rpa rpd rpe rpi rpo rpp rpr rpx rra rrd rri rrp rrr rxp rxr xaa xad xap xar xda xde xdi xdr xed xee xep xer xex xia xie xii xio xix xoa xod xoi xoo xop xor xox xpa xpd xpe xpo xpp xrd xrx xxi xxo xxp xxx