a-a a-b a-i aaa aab aad aaf aai aam aao ab- aba abb abd abf abi abm abo ad- ada adb add adf adi adm ado af- afa afb afd aff afi afm afo ai- aia aib aid aif aii aim aio ama amb amd amf ami amm amo aoa aob aod aof aoi aom aoo baa bab bad baf bai bam bao bba bbb bbd bbf bbi bbm bbo bda bdb bdd bdf bdi bdm bdo bfa bfb bfd bff bfi bfm bfo bi- bia bib bid bif bii bim bio bma bmb bmd bmf bmi bmm bmo boa bob bod bof boi bom boo daa dab dad daf dai dam dao dba dbb dbd dbf dbi dbm dbo dda ddb ddd ddf ddi ddm ddo dfa dfb dfd dff dfi dfm dfo di- dia dib did dif dii dim dio dma dmb dmd dmf dmi dmm dmo doa dob dod dof doi dom doo faa fab fad faf fai fam fao fba fbb fbd fbf fbi fbm fbo fda fdb fdd fdf fdi fdm fdo ffa ffd fff ffi ffm ffo fia fib fid fif fii fim fma fmb fmd fmf fmi fmm fmo foa fob fof foi fom foo i-d i-f ia- iaa iab iad iaf iai iam iao iba ibb ibd ibf ibi ibm ibo ida idb idd idf idi idm ido ifa ifb ifd iff ifi ifm ifo iia iib iid iif iii iim iio im- ima imb imd imf imi imm imo io- ioa iob iod iof ioi iom ioo m-f m-o maa mab mad maf mai mam mao mba mbb mbd mbf mbi mbm mbo mda mdb mdd mdf mdi mdm mdo mfa mfb mfd mff mfi mfm mfo mi- mia mib mid mif mii mim mio mma mmb mmd mmf mmi mmm mmo moa mob mod mof moi mom moo o-i oaa oab oad oaf oai oam oao ob- oba obb obd obf obi obm obo oda odb odd odf odi odm odo of- ofa ofb ofd off ofi ofm ofo oia oib oid oif oii oim oio om- oma omb omd omf omi omm omo oo- ooa oob ood oof ooi oom ooo