-er a-a a-b a-i aaa aab aad aae aaf aai aao aap aar aas ab- aba abb abd abe abf abi abo abp abr abs ad- ada adb add ade adf adi ado adp adr ads aea aeb aed aee aef aei aeo aep aer aes af- afa afb afd afe aff afi afo afp afr afs ai- aia aib aid aie aif aii aio aip air ais aoa aob aod aoe aof aoi aoo aop aor aos ap- apa apb apd ape apf api apo app apr aps ar- ara arb ard are arf ari aro arp arr ars as- asa asb asd ase asf asi aso asp asr ass b-p baa bab bad bae baf bai bao bap bar bas bba bbb bbd bbe bbf bbi bbo bbp bbr bbs bda bdb bdd bde bdf bdi bdo bdp bdr bds be- bea beb bed bee bef bei beo bep ber bes bfa bfb bfd bfe bff bfi bfo bfp bfr bfs bi- bia bib bid bie bif bii bio bip bir bis boa bob bod boe bof boi boo bop bor bos bpa bpb bpd bpe bpf bpi bpo bpp bpr bps bra brb brd bre brf bri bro brp brr brs bsa bsb bsd bse bsf bsi bso bsp bsr bss daa dab dad dae daf dai dao dap dar das dba dbb dbd dbe dbf dbi dbo dbp dbr dbs dda ddb ddd dde ddf ddi ddo ddp ddr dds de- dea deb ded dee def dei deo dep der des dfa dfb dfd dfe dff dfi dfo dfp dfr dfs di- dia dib did die dif dii dio dip dir dis doa dob dod doe dof doi doo dop dor dos dpa dpb dpd dpe dpf dpi dpo dpp dpr dps dra drb drd dre dri dro drp drr drs dsa dsb dsd dse dsf dsi dso dsp dsr dss eaa eab ead eae eaf eai eao eap ear eas eba ebb ebd ebe ebf ebi ebo ebp ebr ebs ed- eda edb edd ede edf edi edo edp edr eds eea eeb eed eee eef eeo eep eer ees ef- efa efb efd efe eff efi efo efp efr efs eia eib eid eie eif eii eio eip eir eis eo- eoa eob eod eoe eof eoi eoo eop eor eos ep- epa epb epd epe epf epi epo epp epr eps era erb erd ere erf eri ero erp err ers es- esa esb esd ese esf esi eso esp esr ess faa fab fad fae faf fai fao fap far fas fba fbb fbd fbe fbf fbi fbo fbp fbr fbs fda fdb fdd fde fdf fdi fdo fdp fdr fds fea feb fed fee fef fei feo fep fer fes ffa ffd ffe fff ffi ffo ffp ffr ffs fia fib fid fie fif fii fip fir fis foa fob foe fof foi foo fop for fos fpa fpb fpd fpe fpi fpo fpp fpr fps fra frb frd fre frf fri fro frp frr frs fsa fsb fsd fse fsf fsi fso fsp fsr fss i-d i-f ia- iaa iab iad iae iaf iai iao iap iar ias iba ibb ibd ibe ibf ibi ibo ibp ibr ibs ida idb idd ide idf idi ido idp idr ids ie- iea ied iee ief iei iep ier ies ifa ifb ifd ife iff ifi ifo ifp ifr ifs iia iib iid iie iif iii iio iip iir iis io- ioa iob iod ioe iof ioi ioo iop ior ios ipa ipb ipd ipe ipf ipi ipo ipp ipr ips ir- ira irb ird ire irf iri iro irp irr irs is- isa isb isd ise isf isi iso isp isr iss o-i oaa oab oad oae oaf oai oao oap oar oas ob- oba obb obd obe obf obi obo obp obr obs oda odb odd ode odf odi odo odp odr ods oea oeb oed oee oef oei oeo oep oer oes of- ofa ofb ofd ofe off ofi ofo ofp ofr ofs oia oib oid oie oif oii oio oip oir ois oo- ooa oob ood oof ooi ooo oop oor oos op- opa opb opd ope opf opi opo opp opr ops or- ora orb ord ore orf ori oro orp orr ors os- osa osb osd ose osf osi oso osp osr oss p-p paa pab pad pae paf pai pao pap par pas pba pbb pbd pbe pbf pbi pbo pbp pbr pbs pda pdb pdd pde pdf pdi pdo pdp pdr pds pea peb ped pee pef pei peo pep per pes pfa pfb pfd pfe pff pfi pfo pfp pfr pfs pia pib pid pie pif pii pio pip pir pis poa pob pod poe pof poi poo pop por pos ppa ppb ppd ppe ppf ppi ppo ppp ppr pps pra prb prd pre prf pri pro prp prr prs ps- psa psb psd pse psf psi pso psp psr pss ra- raa rab rad rae raf rai rao rap rar ras rba rbb rbd rbe rbf rbi rbo rbp rbr rbs rda rdb rdd rde rdf rdi rdo rdp rdr rds re- rea reb red ree ref rei reo rep rer res rfa rfb rfd rfe rff rfi rfo rfp rfr rfs ria rib rid rie rif rii rio rip rir ris roa rob rod roe rof roi roo rop ror ros rpa rpb rpd rpe rpf rpi rpo rpp rpr rps rra rrb rrd rrf rri rrp rrr rrs rsa rsb rsd rse rsf rsi rso rsp rsr rss saa sab sad sae saf sai sao sap sar sas sba sbb sbd sbe sbf sbi sbo sbp sbr sbs sda sdb sdd sde sdf sdi sdo sdp sdr sds se- sea seb sed see sef sei seo sep ser ses sfa sfb sfd sfe sff sfi sfo sfp sfr sfs sia sib sid sie sif sii sio sip sir sis soa sob sod soe sof soi soo sop sor sos spa