-al -ol a-a a-b aaa aab aad aaf aal aao aas aau ab- aba abb abd abf abl abo abs abu ad- ada adb add adf adl ado ads adu af- afa afb afd aff afl afo afs afu al- ala alb ald alf all alo als alu aoa aob aod aof aol aoo aos aou as- asa asb asd asf asl aso ass asu au- aua aub aud auf aul auo aus b-u baa bab bad baf bal bao bas bau bba bbb bbd bbf bbl bbo bbs bbu bda bdb bdd bdf bdl bdo bds bdu bfa bfb bfd bff bfl bfo bfs bfu bla blb bld blf bll blo bls blu boa bob bod bof bol boo bos bou bsa bsb bsd bsf bsl bso bss bsu bua bub bud buf bul buo bus buu daa dab dad daf dal dao das dau dba dbb dbd dbf dbl dbo dbs dbu dda ddb ddd ddf ddl ddo dds ddu dfa dfb dfd dff dfl dfo dfs dfu dl- dla dlb dld dlf dll dlo dls dlu doa dob dod dof dol doo dos dou dsa dsb dsd dsf dsl dso dss dsu dua dub dud duf dul duo dus faa fab fad faf fal fao fas fau fba fbb fbd fbf fbl fbo fbs fbu fda fdb fdd fdf fdl fdo fds fdu ffa ffd fff ffl ffo ffs ffu fla flb fld flf fll flo fls flu foa fob fof fol foo fos fou fsa fsb fsd fsf fsl fso fss fsu fua fub fud fuf ful fuo fus fuu la- laa lab lad laf lal lao las lau lba lbb lbd lbf lbl lbo lbs lbu lda ldb ldd ldf ldl ldo lds ldu lfa lfb lfd lff lfl lfo lfs lfu lla llb lld llf lll llo lls llu loa lob lod lof lol loo los lou lsa lsb lsd lsf lsl lso lss lsu lua lub lud luf lul luo lus luu oaa oab oad oaf oal oao oas oau ob- oba obb obd obf obl obo obs obu oda odb odd odf odl odo ods odu of- ofa ofb ofd off ofl ofo ofs ofu ola olb old olf oll olo ols olu oo- ooa oob ood oof ool ooo oos os- osa osb osd osf osl oso oss osu ou- oua oud ouf oul ouo ous saa sab sad saf sal sao sas sau sba sbb sbd sbf sbl sbo sbs sbu sda sdb sdd sdf sdl sdo sds sdu sfa sfb sfd sff sfl sfo sfs sfu sla slb sld slf sll slo sls slu soa sob sod sof sol soo sos sou ss- ssa ssb ssd ssf ssl sso sss ssu sua sub sud suf sul suo sus suu ua- uaa uab uad uaf ual uao uas uau uba ubb ubf ubl ubo ubs ubu uda udb udd udf udl udo uds udu ufa ufd uff ufl ufo ufs ufu ula ulb uld ulf ull ulo uls ulu uoa uob uod uol uoo uos usa usb usd usf usl uso uss usu uua uus uuu