-al -ol a-a a-b a-c a-t aaa aab aac aad aaf aal aao aat aau ab- aba abb abc abd abf abl abo abt abu ac- aca acb acc acd acf acl aco act acu ad- ada adb adc add adf adl ado adt adu af- afa afb afc afd aff afl afo aft afu al- ala alb alc ald alf all alo alt alu aoa aob aoc aod aof aol aoo aot aou at- ata atb atc atd atf atl ato att atu au- aua aub auc aud auf aul auo aut b-u baa bab bac bad baf bal bao bat bau bba bbb bbc bbd bbf bbl bbo bbt bbu bca bcb bcc bcd bcf bcl bco bct bcu bda bdb bdc bdd bdf bdl bdo bdt bdu bfa bfb bfc bfd bff bfl bfo bft bfu bla blb blc bld blf bll blo blt blu boa bob boc bod bof bol boo bot bou bta btb btc btd btf btl bto btt btu bua bub buc bud buf bul buo but buu c-- caa cab cac cad caf cal cao cat cau cba cbb cbc cbd cbf cbl cbo cbt cbu cca ccb ccc ccd ccf ccl cco cct ccu cda cdb cdc cdd cdf cdl cdo cdt cdu cfa cfb cfc cfd cff cfl cfo cft cfu cl- cla clb clc cld clf cll clo clt clu co- coa cob coc cod cof col coo cot cou cta ctb ctc ctd ctf ctl cto ctt ctu cua cub cuc cud cuf cul cuo cut cuu daa dab dac dad daf dal dao dat dau dba dbb dbc dbd dbf dbl dbo dbt dbu dca dcb dcc dcd dcf dcl dco dct dcu dda ddb ddc ddd ddf ddl ddo ddt ddu dfa dfb dfc dfd dff dfl dfo dft dfu dl- dla dlb dlc dld dlf dll dlo dlt dlu doa dob doc dod dof dol doo dot dou dta dtb dtc dtd dtf dtl dto dtt dtu dua dub duc dud duf dul duo dut faa fab fac fad faf fal fao fat fau fba fbb fbc fbd fbf fbl fbo fbt fbu fca fcb fcc fcd fcf fcl fco fct fcu fda fdb fdc fdd fdf fdl fdo fdt fdu ffa ffc ffd fff ffl ffo fft ffu fla flb flc fld flf fll flo flt flu foa fob foc fof fol foo fot fou fta ftb ftc ftd ftf ftl fto ftt ftu fua fub fud fuf ful fuo fut fuu la- laa lab lac lad laf lal lao lat lau lba lbb lbc lbd lbf lbl lbo lbt lbu lca lcb lcc lcd lcf lcl lco lct lcu lda ldb ldc ldd ldf ldl ldo ldt ldu lfa lfb lfc lfd lff lfl lfo lft lfu lla llb llc lld llf lll llo llt llu loa lob loc lod lof lol loo lot lou lta ltb ltc ltd ltf ltl lto ltt ltu lua lub luc lud luf lul luo lut luu oaa oab oac oad oaf oal oao oat oau ob- oba obb obc obd obf obl obo obt obu oc- oca ocb occ ocd ocf ocl oco oct ocu oda odb odc odd odf odl odo odt odu of- ofa ofb ofc ofd off ofl ofo oft ofu ola olb olc old olf oll olo olt olu oo- ooa oob ooc ood oof ool ooo oot ot- ota otb otc otd otf otl oto ott otu ou- oua ouc oud ouf oul ouo out taa tab tac tad taf tal tao tat tau tba tbb tbc tbd tbf tbl tbo tbt tbu tca tcb tcc tcd tcf tcl tco tct tcu tda tdb tdc tdd tdf tdl tdo tdt tdu tfa tfb tfc tfd tff tfl tfo tft tfu tla tlc tld tlf tll tlo tlt tlu to- toa tob toc tod tof tol too tot tou tta ttb ttc ttd ttf ttl tto ttt ttu tua tub tuc tud tuf tul tuo tut tuu ua- uaa uab uac uad uaf ual uao uat uau uba ubb ubc ubf ubl ubo ubt ubu uca ucb ucc ucd ucf ucl uco uct ucu uda udb udc udd udf udl udo udt udu ufa ufc ufd uff ufl ufo uft ufu ula ulb ulc uld ulf ull ulo ult ulu uoa uob uoc uod uol uoo uot uta utb utc utd utf utl uto utt utu uua uuc uut uuu