-al -ol a-a a-b a-c a-t aaa aab aac aaf aal aao aat aau ab- aba abb abc abf abl abo abt abu ac- aca acb acc acf acl aco act acu af- afa afb afc aff afl afo aft afu al- ala alb alc alf all alo alt alu aoa aob aoc aof aol aoo aot aou at- ata atb atc atf atl ato att atu au- aua aub auc auf aul auo aut b-u baa bab bac baf bal bao bat bau bba bbb bbc bbf bbl bbo bbt bbu bca bcb bcc bcf bcl bco bct bcu bfa bfb bfc bff bfl bfo bft bfu bla blb blc blf bll blo blt blu boa bob boc bof bol boo bot bou bta btb btc btf btl bto btt btu bua bub buc buf bul buo but buu c-- caa cab cac caf cal cao cat cau cba cbb cbc cbf cbl cbo cbt cbu cca ccb ccc ccf ccl cco cct ccu cfa cfb cfc cff cfl cfo cft cfu cl- cla clb clc clf cll clo clt clu co- coa cob coc cof col coo cot cou cta ctb ctc ctf ctl cto ctt ctu cua cub cuc cuf cul cuo cut cuu faa fab fac faf fal fao fat fau fba fbb fbc fbf fbl fbo fbt fbu fca fcb fcc fcf fcl fco fct fcu ffa ffc fff ffl ffo fft ffu fla flb flc flf fll flo flt flu foa fob foc fof fol foo fot fou fta ftb ftc ftf ftl fto ftt ftu fua fub fuf ful fuo fut fuu la- laa lab lac laf lal lao lat lau lba lbb lbc lbf lbl lbo lbt lbu lca lcb lcc lcf lcl lco lct lcu lfa lfb lfc lff lfl lfo lft lfu lla llb llc llf lll llo llt llu loa lob loc lof lol loo lot lou lta ltb ltc ltf ltl lto ltt ltu lua lub luc luf lul luo lut luu oaa oab oac oaf oal oao oat oau ob- oba obb obc obf obl obo obt obu oc- oca ocb occ ocf ocl oco oct ocu of- ofa ofb ofc off ofl ofo oft ofu ola olb olc olf oll olo olt olu oo- ooa oob ooc oof ool ooo oot ot- ota otb otc otf otl oto ott otu ou- oua ouc ouf oul ouo out taa tab tac taf tal tao tat tau tba tbb tbc tbf tbl tbo tbt tbu tca tcb tcc tcf tcl tco tct tcu tfa tfb tfc tff tfl tfo tft tfu tla tlc tlf tll tlo tlt tlu to- toa tob toc tof tol too tot tou tta ttb ttc ttf ttl tto ttt ttu tua tub tuc tuf tul tuo tut tuu ua- uaa uab uac uaf ual uao uat uau uba ubb ubc ubf ubl ubo ubt ubu uca ucb ucc ucf ucl uco uct ucu ufa ufc uff ufl ufo uft ufu ula ulb ulc ulf ull ulo ult ulu uoa uob uoc uol uoo uot uta utb utc utf utl uto utt utu uua uuc uut uuu