-ic a-a a-b a-c a-i aaa aab aac aad aai aao aap aar aas ab- aba abb abc abd abi abo abp abr abs ac- aca acb acc acd aci aco acp acr acs ad- ada adb adc add adi ado adp adr ads ai- aia aib aic aid aii aio aip air ais aoa aob aoc aod aoi aoo aop aor aos ap- apa apb apc apd api apo app apr aps ar- ara arb arc ard ari aro arp arr ars as- asa asb asc asd asi aso asp asr ass b-p baa bab bac bad bai bao bap bar bas bba bbb bbc bbd bbi bbo bbp bbr bbs bca bcb bcc bcd bci bco bcp bcr bcs bda bdb bdc bdd bdi bdo bdp bdr bds bi- bia bib bic bid bii bio bip bir bis boa bob boc bod boi boo bop bor bos bpa bpb bpc bpd bpi bpo bpp bpr bps bra brb brd bri bro brp brr brs bsa bsb bsc bsd bsi bso bsp bsr bss c-- caa cab cac cad cai cao cap car cas cba cbb cbc cbd cbi cbo cbp cbr cbs cca ccb ccc ccd cci cco ccp ccr ccs cda cdb cdc cdd cdi cdo cdp cdr cds ci- cia cib cic cid cii cio cip cir cis co- coa cob coc cod coi coo cop cor cos cpa cpb cpc cpd cpi cpo cpp cpr cps cra crb crc crd cri cro crp crr crs csa csb csc csd csi cso csp csr css daa dab dac dad dai dao dap dar das dba dbb dbc dbd dbi dbo dbp dbr dbs dca dcb dcc dcd dci dco dcp dcr dcs dda ddb ddc ddd ddi ddo ddp ddr dds di- dia dib dic did dii dio dip dir dis doa dob doc dod doi doo dop dor dos dpa dpb dpc dpd dpi dpo dpp dpr dps dra drb drc drd dri dro drp drr drs dsa dsb dsc dsd dsi dso dsp dsr dss i-d ia- iaa iab iac iad iai iao iap iar ias iba ibb ibc ibd ibi ibo ibp ibr ibs ica icb icc icd ici ico icp icr ics ida idb idc idd idi ido idp idr ids iia iib iic iid iii iio iip iir iis io- ioa iob ioc iod ioi ioo iop ior ios ipa ipb ipc ipd ipi ipo ipp ipr ips ir- ira irb irc ird iri iro irp irr irs is- isa isb isc isd isi iso isp isr iss o-i oaa oab oac oad oai oao oap oar oas ob- oba obb obc obd obi obo obp obr obs oc- oca ocb occ ocd oci oco ocp ocr ocs oda odb odc odd odi odo odp odr ods oia oib oic oid oii oio oip oir ois oo- ooa oob ooc ood ooi ooo oop oor oos op- opa opb opc opd opi opo opp opr ops or- ora orb orc ord ori oro orp orr ors os- osa osb osc osd osi oso osp osr oss p-p paa pab pac pad pai pao pap par pas pba pbb pbc pbd pbi pbo pbp pbr pbs pca pcb pcc pcd pci pco pcp pcr pcs pda pdb pdc pdd pdi pdo pdp pdr pds pia pib pic pid pii pio pip pir pis poa pob poc pod poi poo pop por pos ppa ppb ppc ppd ppi ppo ppp ppr pps pra prb prc prd pri pro prp prr prs ps- psa psb psc psd psi pso psp psr pss ra- raa rab rac rad rai rao rap rar ras rba rbb rbc rbd rbi rbo rbp rbr rbs rca rcb rcc rcd rci rco rcp rcr rcs rda rdb rdc rdd rdi rdo rdp rdr rds ria rib ric rid rii rio rip rir ris roa rob roc rod roi roo rop ror ros rpa rpb rpc rpd rpi rpo rpp rpr rps rra rrb rrc rrd rri rrp rrr rrs rsa rsb rsc rsd rsi rso rsp rsr rss saa sab sac sad sai sao sap sar sas sba sbb sbc sbd sbi sbo sbp sbr sbs sca scb scc scd sci sco scp scr scs sda sdb sdc sdd sdi sdo sdp sdr sds sia sib sic sid sii sio sip sir sis soa sob soc sod soi soo sop sor sos spa spb spc spd spi spo spp spr sps sr- sra srb src srd sri sro srp srr srs ss- ssa ssb ssc ssd ssi sso ssp ssr sss

a-do a-ii aaaa aaab aaac aaad aaai aaap aaar aaas aaba aabb aabc aabd aabi aabp aaca aacb aacc aacd aaci aaco aacp aacr aacs aada aadc aadi aads aaib aaic aaii aais aaoo aapa aapc aapi aapo aaps aara aarc aard aari aaro aarp aars aasa aasc aasd aasi aass abaa abab abac abad abai abap abar abas abb- abba abbb abbi abbo abbr abbs abca abcb abcc abcd abci abcp abcr abcs abda abdi abdo abia abib abic abid abir abis aboa abob abod aboo abor abos abpa abpc abpd abpi abpp abpr abps abra abrc abri abro abrs abs- absa absd absi absp abss acaa acab acac acad acai acap acar acas acba acca accc accd acci acco accp accs acda acdb acdc acdi acdp acds aci- acia acic acid acip acir acis acoa acod acop acor acos acpa acpd acpi acpr acps acr- acra acrc acri acro acrr acrs acsa acsc acsd acsi acss adaa adab adac adad adai adao adap adar adas adba adbc adbi adcc adci adcs adda addc addd addi addo addr adds adia adib adic adio adip adir adis adob adoc adod adoo ador ados adp- adps adra adro adrs adsa adsi adso adsr adss aiai aias aiba aibo aica aicc aicd aicp aicr aics aida aidb aidc aidi aidr aids aiia aiib aiic aiid aiir aioc aioi aipa aipi aips aira aird airi airo airp airs aisa aisb aisd