-al -ol a-a a-b a-i a-t aaa aab aai aal aao aas aat ab- aba abb abi abl abo abs abt ai- aia aib aii ail aio ais ait al- ala alb ali all alo als alt aoa aob aoi aol aoo aos aot as- asa asb asi asl aso ass ast at- ata atb ati atl ato ats att baa bab bai bal bao bas bat bba bbb bbi bbl bbo bbs bbt bi- bia bib bii bil bio bis bit bla blb bli bll blo bls blt boa bob boi bol boo bos bot bsa bsb bsi bsl bso bss bst bta btb bti btl bto bts btt ia- iaa iab iai ial iao ias iat iba ibb ibi ibl ibo ibs ibt iia iib iii iil iio iis iit il- ila ilb ili ill ilo ils ilt io- ioa iob ioi iol ioo ios iot is- isa isb isi isl iso iss ist ita itb iti itl ito its itt la- laa lab lai lal lao las lat lba lbb lbi lbl lbo lbs lbt lia lib lii lil lio lis lit lla llb lli lll llo lls llt loa lob loi lol loo los lot lsa lsb lsi lsl lso lss lst lta ltb lti ltl lto lts ltt o-i oaa oab oai oal oao oas oat ob- oba obb obi obl obo obs obt oia oib oii oil oio ois oit ola olb oli oll olo ols olt oo- ooa oob ooi ool ooo oos oot os- osa osb osi osl oso oss ost ot- ota otb oti otl oto ots ott saa sab sai sal sao sas sat sba sbb sbi sbl sbo sbs sbt sia sib sii sil sio sis sit sla slb sli sll slo sls slt soa sob soi sol soo sos sot ss- ssa ssb ssi ssl sso sss sst sta stb sti stl sto sts stt taa tab tai tal tao tas tat tba tbb tbi tbl tbo tbs tbt tia tib tii til tio tis tit tla tli tll tlo tls tlt to- toa tob toi tol too tos tot tsa tsb tsi tsl tso tss tst tta ttb tti ttl tto tts ttt