-al -ol a-a a-b a-i a-t aaa aab aaf aai aal aao aat ab- aba abb abf abi abl abo abt af- afa afb aff afi afl afo aft ai- aia aib aif aii ail aio ait al- ala alb alf ali all alo alt aoa aob aof aoi aol aoo aot at- ata atb atf ati atl ato att baa bab baf bai bal bao bat bba bbb bbf bbi bbl bbo bbt bfa bfb bff bfi bfl bfo bft bi- bia bib bif bii bil bio bit bla blb blf bli bll blo blt boa bob bof boi bol boo bot bta btb btf bti btl bto btt faa fab faf fai fal fao fat fba fbb fbf fbi fbl fbo fbt ffa fff ffi ffl ffo fft fia fib fif fii fil fit fla flb flf fli fll flo flt foa fob fof foi fol foo fot fta ftb ftf fti ftl fto ftt i-f ia- iaa iab iaf iai ial iao iat iba ibb ibf ibi ibl ibo ibt ifa ifb iff ifi ifl ifo ift iia iib iif iii iil iio iit il- ila ilb ilf ili ill ilo ilt io- ioa iob iof ioi iol ioo iot ita itb itf iti itl ito itt la- laa lab laf lai lal lao lat lba lbb lbf lbi lbl lbo lbt lfa lfb lff lfi lfl lfo lft lia lib lif lii lil lio lit lla llb llf lli lll llo llt loa lob lof loi lol loo lot lta ltb ltf lti ltl lto ltt o-i oaa oab oaf oai oal oao oat ob- oba obb obf obi obl obo obt of- ofa ofb off ofi ofl ofo oft oia oib oif oii oil oio oit ola olb olf oli oll olo olt oo- ooa oob oof ooi ool ooo oot ot- ota otb otf oti otl oto ott taa tab taf tai tal tao tat tba tbb tbf tbi tbl tbo tbt tfa tfb tff tfi tfl tfo tft tia tib tif tii til tio tit tla tlf tli tll tlo tlt to- toa tob tof toi tol too tot tta ttb ttf tti ttl tto ttt