-al a-a a-c a-t aaa aac aad aae aaf aal aat ac- aca acc acd ace acf acl act ad- ada adc add ade adf adl adt aea aec aed aee aef ael aet af- afa afc afd afe aff afl aft al- ala alc ald ale alf all alt at- ata atc atd ate atf atl att c-- caa cac cad cae caf cal cat cca ccc ccd cce ccf ccl cct cda cdc cdd cde cdf cdl cdt ce- cea cec ced cee cef cel cet cfa cfc cfd cfe cff cfl cft cl- cla clc cld cle clf cll clt cta ctc ctd cte ctf ctl ctt daa dac dad dae daf dal dat dca dcc dcd dce dcf dcl dct dda ddc ddd dde ddf ddl ddt de- dea dec ded dee def del det dfa dfc dfd dfe dff dfl dft dl- dla dlc dld dle dlf dll dlt dta dtc dtd dte dtf dtl dtt eaa eac ead eae eaf eal eat ec- eca ecc ecd ece ecf ecl ect ed- eda edc edd ede edf edl edt eea eec eed eee eef eel eet ef- efa efc efd efe eff efl eft ela elc eld ele elf ell elt eta etc etd ete etf etl ett faa fac fad fae faf fal fat fca fcc fcd fce fcf fcl fct fda fdc fdd fde fdf fdl fdt fea fec fed fee fef fel fet ffa ffc ffd ffe fff ffl fft fla flc fld fle flf fll flt fta ftc ftd fte ftf ftl ftt la- laa lac lad lae laf lal lat lca lcc lcd lce lcf lcl lct lda ldc ldd lde ldf ldl ldt lea lec led lee lef lel let lfa lfc lfd lfe lff lfl lft lla llc lld lle llf lll llt lta ltc ltd lte ltf ltl ltt taa tac tad tae taf tal tat tca tcc tcd tce tcf tcl tct tda tdc tdd tde tdf tdl tdt te- tea tec ted tee tef tel tet tfa tfc tfd tfe tff tfl tft tla tlc tld tle tlf tll tlt tta ttc ttd tte ttf ttl ttt