a-a a-b a-i aaa aab aad aai aam aao aas ab- aba abb abd abi abm abo abs ad- ada adb add adi adm ado ads ai- aia aib aid aii aim aio ais ama amb amd ami amm amo ams aoa aob aod aoi aom aoo aos as- asa asb asd asi asm aso ass baa bab bad bai bam bao bas bba bbb bbd bbi bbm bbo bbs bda bdb bdd bdi bdm bdo bds bi- bia bib bid bii bim bio bis bma bmb bmd bmi bmm bmo bms boa bob bod boi bom boo bos bsa bsb bsd bsi bsm bso bss daa dab dad dai dam dao das dba dbb dbd dbi dbm dbo dbs dda ddb ddd ddi ddm ddo dds di- dia dib did dii dim dio dis dma dmb dmd dmi dmm dmo dms doa dob dod doi dom doo dos dsa dsb dsd dsi dsm dso dss i-d ia- iaa iab iad iai iam iao ias iba ibb ibd ibi ibm ibo ibs ida idb idd idi idm ido ids iia iib iid iii iim iio iis im- ima imb imd imi imm imo ims io- ioa iob iod ioi iom ioo ios is- isa isb isd isi ism iso iss m-o maa mab mad mai mam mao mas mba mbb mbd mbi mbm mbo mbs mda mdb mdd mdi mdm mdo mds mi- mia mib mid mii mim mio mis mma mmb mmd mmi mmm mmo mms moa mob mod moi mom moo mos msa msb msd msi msm mso mss o-i oaa oab oad oai oam oao oas ob- oba obb obd obi obm obo obs oda odb odd odi odm odo ods oia oib oid oii oim oio ois om- oma omb omd omi omm omo oms oo- ooa oob ood ooi oom ooo oos os- osa osb osd osi osm oso oss saa sab sad sai sam sao sas sba sbb sbd sbi sbm sbo sbs sda sdb sdd sdi sdm sdo sds sia sib sid sii sim sio sis sma smb smd smi smm smo sms soa sob sod soi som soo sos ss- ssa ssb ssd ssi ssm sso sss