-ic a-a a-b a-c a-i aaa aab aac aad aai aam aao aar aas ab- aba abb abc abd abi abm abo abr abs ac- aca acb acc acd aci acm aco acr acs ad- ada adb adc add adi adm ado adr ads ai- aia aib aic aid aii aim aio air ais ama amb amc amd ami amm amo amr ams aoa aob aoc aod aoi aom aoo aor aos ar- ara arb arc ard ari arm aro arr ars as- asa asb asc asd asi asm aso asr ass baa bab bac bad bai bam bao bar bas bba bbb bbc bbd bbi bbm bbo bbr bbs bca bcb bcc bcd bci bcm bco bcr bcs bda bdb bdc bdd bdi bdm bdo bdr bds bi- bia bib bic bid bii bim bio bir bis bma bmb bmc bmd bmi bmm bmo bmr bms boa bob boc bod boi bom boo bor bos bra brb brd bri brm bro brr brs bsa bsb bsc bsd bsi bsm bso bsr bss c-- caa cab cac cad cai cam cao car cas cba cbb cbc cbd cbi cbm cbo cbr cbs cca ccb ccc ccd cci ccm cco ccr ccs cda cdb cdc cdd cdi cdm cdo cdr cds ci- cia cib cic cid cii cim cio cir cis cma cmb cmc cmd cmi cmm cmo cmr cms co- coa cob coc cod coi com coo cor cos cra crb crc crd cri crm cro crr crs csa csb csc csd csi csm cso csr css daa dab dac dad dai dam dao dar das dba dbb dbc dbd dbi dbm dbo dbr dbs dca dcb dcc dcd dci dcm dco dcr dcs dda ddb ddc ddd ddi ddm ddo ddr dds di- dia dib dic did dii dim dio dir dis dma dmb dmc dmd dmi dmm dmo dmr dms doa dob doc dod doi dom doo dor dos dra drb drc drd dri drm dro drr drs dsa dsb dsc dsd dsi dsm dso dsr dss i-d ia- iaa iab iac iad iai iam iao iar ias iba ibb ibc ibd ibi ibm ibo ibr ibs ica icb icc icd ici icm ico icr ics ida idb idc idd idi idm ido idr ids iia iib iic iid iii iim iio iir iis im- ima imb imc imd imi imm imo ims io- ioa iob ioc iod ioi iom ioo ior ios ir- ira irb irc ird iri irm iro irr irs is- isa isb isc isd isi ism iso isr iss m-o m-r maa mab mac mad mai mam mao mar mas mba mbb mbc mbd mbi mbm mbo mbr mbs mc- mca mcb mcc mcd mci mcm mco mcr mcs mda mdb mdc mdd mdi mdm mdo mdr mds mi- mia mib mic mid mii mim mio mir mis mma mmb mmc mmd mmi mmm mmo mmr mms moa mob moc mod moi mom moo mor mos mra mrb mrc mrd mri mrm mro mrr mrs msa msb msc msd msi msm mso msr mss o-i oaa oab oac oad oai oam oao oar oas ob- oba obb obc obd obi obm obo obr obs oc- oca ocb occ ocd oci ocm oco ocr ocs oda odb odc odd odi odm odo odr ods oia oib oic oid oii oim oio oir ois om- oma omb omc omd omi omm omo omr oms oo- ooa oob ooc ood ooi oom ooo oor oos or- ora orb orc ord ori orm oro orr ors os- osa osb osc osd osi osm oso osr oss ra- raa rab rac rad rai ram rao rar ras rba rbb rbc rbd rbi rbm rbo rbr rbs rca rcb rcc rcd rci rcm rco rcr rcs rda rdb rdc rdd rdi rdm rdo rdr rds ria rib ric rid rii rim rio rir ris rma rmb rmc rmd rmi rmm rmo rmr rms roa rob roc rod roi rom roo ror ros rra rrb rrc rrd rri rrm rrr rrs rsa rsb rsc rsd rsi rsm rso rsr rss saa sab sac sad sai sam sao sar sas sba sbb sbc sbd sbi sbm sbo sbr sbs sca scb scc scd sci scm sco scr scs sda sdb sdc sdd sdi sdm sdo sdr sds sia sib sic sid sii sim sio sir sis sma smb smc smd smi smm smo smr sms soa sob soc sod soi som soo sor sos sr- sra srb src srd sri srm sro srr srs ss- ssa ssb ssc ssd ssi ssm sso ssr sss