-al -ol a-a a-c a-t aaa aac aad aaf aal aao aas aat ac- aca acc acd acf acl aco acs act ad- ada adc add adf adl ado ads adt af- afa afc afd aff afl afo afs aft al- ala alc ald alf all alo als alt aoa aoc aod aof aol aoo aos aot as- asa asc asd asf asl aso ass ast at- ata atc atd atf atl ato ats att c-- caa cac cad caf cal cao cas cat cca ccc ccd ccf ccl cco ccs cct cda cdc cdd cdf cdl cdo cds cdt cfa cfc cfd cff cfl cfo cfs cft cl- cla clc cld clf cll clo cls clt co- coa coc cod cof col coo cos cot csa csc csd csf csl cso css cst cta ctc ctd ctf ctl cto cts ctt daa dac dad daf dal dao das dat dca dcc dcd dcf dcl dco dcs dct dda ddc ddd ddf ddl ddo dds ddt dfa dfc dfd dff dfl dfo dfs dft dl- dla dlc dld dlf dll dlo dls dlt doa doc dod dof dol doo dos dot dsa dsc dsd dsf dsl dso dss dst dta dtc dtd dtf dtl dto dts dtt faa fac fad faf fal fao fas fat fca fcc fcd fcf fcl fco fcs fct fda fdc fdd fdf fdl fdo fds fdt ffa ffc ffd fff ffl ffo ffs fft fla flc fld flf fll flo fls flt foa foc fof fol foo fos fot fsa fsc fsd fsf fsl fso fss fst fta ftc ftd ftf ftl fto fts ftt la- laa lac lad laf lal lao las lat lca lcc lcd lcf lcl lco lcs lct lda ldc ldd ldf ldl ldo lds ldt lfa lfc lfd lff lfl lfo lfs lft lla llc lld llf lll llo lls llt loa loc lod lof lol loo los lot lsa lsc lsd lsf lsl lso lss lst lta ltc ltd ltf ltl lto lts ltt oaa oac oad oaf oal oao oas oat oc- oca occ ocd ocf ocl oco ocs oct oda odc odd odf odl odo ods odt of- ofa ofc ofd off ofl ofo ofs oft ola olc old olf oll olo ols olt oo- ooa ooc ood oof ool ooo oos oot os- osa osc osd osf osl oso oss ost ot- ota otc otd otf otl oto ots ott saa sac sad saf sal sao sas sat sca scc scd scf scl sco scs sct sda sdc sdd sdf sdl sdo sds sdt sfa sfc sfd sff sfl sfo sfs sft sla slc sld slf sll slo sls slt soa soc sod sof sol soo sos sot ss- ssa ssc ssd ssf ssl sso sss sst sta stc std stf stl sto sts stt taa tac tad taf tal tao tas tat tca tcc tcd tcf tcl tco tcs tct tda tdc tdd tdf tdl tdo tds tdt tfa tfc tfd tff tfl tfo tfs tft tla tlc tld tlf tll tlo tls tlt to- toa toc tod tof tol too tos tot tsa tsc tsd tsf tsl tso tss tst tta ttc ttd ttf ttl tto tts ttt