-er a-a a-b a-i aaa aab aad aae aai aan aap aar aas ab- aba abb abd abe abi abn abp abr abs ad- ada adb add ade adi adn adp adr ads aea aeb aed aee aei aen aep aer aes ai- aia aib aid aie aii ain aip air ais an- ana anb and ane ani ann anp anr ans ap- apa apb apd ape api apn app apr aps ar- ara arb ard are ari arn arp arr ars as- asa asb asd ase asi asn asp asr ass b-p baa bab bad bae bai ban bap bar bas bba bbb bbd bbe bbi bbn bbp bbr bbs bda bdb bdd bde bdi bdp bdr bds be- bea beb bed bee bei ben bep ber bes bi- bia bib bid bie bii bin bip bir bis bna bnb bnd bne bni bnn bnp bnr bns bpa bpb bpd bpe bpi bpn bpp bpr bps bra brb brd bre bri brn brp brr brs bsa bsb bsd bse bsi bsn bsp bsr bss daa dab dad dae dai dan dap dar das dba dbb dbd dbe dbi dbn dbp dbr dbs dda ddb ddd dde ddi ddn ddp ddr dds de- dea deb ded dee dei den dep der des di- dia dib did die dii din dip dir dis dna dnb dnd dne dni dnn dnp dnr dns dpa dpb dpd dpe dpi dpn dpp dpr dps dra drb drd dre dri drn drp drr drs dsa dsb dsd dse dsi dsn dsp dsr dss eaa eab ead eae eai ean eap ear eas eba ebb ebd ebe ebi ebn ebp ebr ebs ed- eda edb edd ede edi edn edp edr eds eea eeb eed eee een eep eer ees eia eib eid eie eii ein eip eir eis en- ena enb end ene eni enn enp enr ens ep- epa epb epd epe epi epn epp epr eps era erb erd ere eri ern erp err ers es- esa esb esd ese esi esn esp esr ess i-d ia- iaa iab iad iae iai ian iap iar ias iba ibb ibd ibe ibi ibn ibp ibr ibs ida idb idd ide idi idn idp idr ids ie- iea ied iee iei ien iep ier ies iia iib iid iie iii iin iip iir iis in- ina inb ind ine ini inn inp inr ins ipa ipb ipd ipe ipi ipn ipp ipr ips ir- ira irb ird ire iri irn irp irr irs is- isa isb isd ise isi isn isp isr iss n-i naa nab nad nae nai nan nap nar nas nba nbb nbd nbe nbi nbn nbp nbr nbs nda ndb ndd nde ndi ndn ndp ndr nds ne- nea neb ned nee nei nen nep ner nes nia nib nid nie nii nin nip nir nis nna nnb nne nni nnn nnp nns npa npb npd npe npi npn npp npr nps nra nrb nrd nre nri nrn nrp nrr nrs nsa nsb nsd nse nsi nsn nsp nsr nss p-p paa pab pad pae pai pan pap par pas pba pbb pbd pbe pbi pbn pbp pbr pbs pda pdb pdd pde pdi pdn pdp pdr pds pea peb ped pee pei pen pep per pes pia pib pid pie pii pin pip pir pis pn- pna pnb pnd pne pni pnn pnp pnr pns ppa ppb ppd ppe ppi ppn ppp ppr pps pra prb prd pre pri prn prp prr prs ps- psa psb psd pse psi psn psp psr pss ra- raa rab rad rae rai ran rap rar ras rba rbb rbd rbe rbi rbn rbp rbr rbs rda rdb rdd rde rdi rdn rdp rdr rds re- rea reb red ree rei ren rep rer res ria rib rid rie rii rin rip rir ris rna rnb rnd rni rnn rnp rnr rns rpa rpb rpd rpe rpi rpn rpp rpr rps rra rrb rrd rri rrn rrp rrr rrs rsa rsb rsd rse rsi rsn rsp rsr rss saa sab sad sae sai san sap sar sas sba sbb sbd sbe sbi sbn sbp sbr sbs sda sdb sdd sde sdi sdn sdp sdr sds se- sea seb sed see sei sen sep ser ses sia sib sid sie sii sin sip sir sis sna snb snd sne sni snn snp snr sns spa spb spd spe spi spn spp spr sps sr- sra srb srd sre sri srn srp srr srs ss- ssa ssb ssd sse ssi ssn ssp ssr sss