-er a-a a-b a-i aaa aab aad aae aag aai aao aap aar ab- aba abb abd abe abg abi abo abp abr ad- ada adb add ade adg adi ado adp adr aea aeb aed aee aeg aei aeo aep aer ag- aga agb agd age agg agi ago agp agr ai- aia aib aid aie aig aii aio aip air aoa aob aod aoe aog aoi aoo aop aor ap- apa apb apd ape apg api apo app apr ar- ara arb ard are arg ari aro arp arr b-p baa bab bad bae bag bai bao bap bar bba bbb bbd bbe bbg bbi bbo bbp bbr bda bdb bdd bde bdg bdi bdo bdp bdr be- bea beb bed bee beg bei beo bep ber bga bgb bgd bge bgg bgi bgo bgp bgr bi- bia bib bid bie big bii bio bip bir boa bob bod boe bog boi boo bop bor bpa bpb bpd bpe bpg bpi bpo bpp bpr bra brb brd bre brg bri bro brp brr daa dab dad dae dag dai dao dap dar dba dbb dbd dbe dbg dbi dbo dbp dbr dda ddb ddd dde ddg ddi ddo ddp ddr de- dea deb ded dee deg dei deo dep der dga dgd dge dgg dgi dgp dgr di- dia dib did die dig dii dio dip dir doa dob dod doe dog doi doo dop dor dpa dpb dpd dpe dpg dpi dpo dpp dpr dra drb drd dre drg dri dro drp drr eaa eab ead eae eag eai eao eap ear eba ebb ebd ebe ebg ebi ebo ebp ebr ed- eda edb edd ede edg edi edo edp edr eea eeb eed eee eeg eeo eep eer ega egb egd ege egg egi ego egp egr eia eib eid eie eig eii eio eip eir eo- eoa eob eod eoe eog eoi eoo eop eor ep- epa epb epd epe epg epi epo epp epr era erb erd ere erg eri ero erp err g-d g-p gaa gab gad gae gag gai gao gap gar gba gbd gbe gbg gbi gbo gbp gbr gda gdb gdd gde gdi gdo gdp gdr ge- gea geb ged gee geg gei geo gep ger gga ggb ggd ggg ggi ggo ggp ggr gia gib gid gie gig gii gio gip gir goa gob god goe gog goi goo gop gor gpa gpb gpd gpe gpg gpi gpo gpp gpr gra grb grd gre grg gri gro grp grr i-d ia- iaa iab iad iae iag iai iao iap iar iba ibb ibd ibe ibg ibi ibo ibp ibr ida idb idd ide idg idi ido idp idr ie- iea ied iee ieg iei iep ier iga igb igd ige igg igi igo igp igr iia iib iid iie iii iio iip iir io- ioa iob iod ioe iog ioi ioo iop ior ipa ipb ipd ipe ipg ipi ipo ipp ipr ir- ira irb ird ire irg iri iro irp irr o-i oaa oab oad oae oag oai oao oap oar ob- oba obb obd obe obg obi obo obp obr oda odb odd ode odg odi odo odp odr oea oeb oed oee oeg oei oeo oep oer oga ogd oge ogg ogi ogo ogp oia oib oid oie oii oio oip oir oo- ooa oob ood oog ooi ooo oop oor op- opa opb opd ope opg opi opo opp opr or- ora orb ord ore org ori oro orp orr p-p paa pab pad pae pag pai pao pap par pba pbb pbd pbe pbg pbi pbo pbp pbr pda pdb pdd pde pdg pdi pdo pdp pdr pea peb ped pee peg pei peo pep per pga pgb pgd pge pgg pgi pgo pgp pgr pia pib pid pie pig pii pio pip pir poa pob pod poe pog poi poo pop por ppa ppb ppd ppe ppg ppi ppo ppp ppr pra prb prd pre prg pri pro prp prr ra- raa rab rad rae rag rai rao rap rar rba rbb rbd rbe rbg rbi rbo rbp rbr rda rdb rdd rde rdg rdi rdo rdp rdr re- rea reb red ree reg rei reo rep rer rga rgb rgd rge rgg rgi rgo rgp rgr ria rib rid rie rig rii rio rip rir roa rob rod roe rog roi roo rop ror rpa rpb rpd rpe rpg rpi rpo rpp rpr rra rrb rrd rrg rri rrp rrr