-al a-a a-c aaa aac aad aae aaf aal ac- aca acc acd ace acf acl ad- ada adc add ade adf adl aea aec aed aee aef ael af- afa afc afd afe aff afl al- ala alc ald ale alf all c-- caa cac cad cae caf cal cca ccc ccd cce ccf ccl cda cdc cdd cde cdf cdl ce- cea cec ced cee cef cel cfa cfc cfd cfe cff cfl cl- cla clc cld cle clf cll daa dac dad dae daf dal dca dcc dcd dce dcf dcl dda ddc ddd dde ddf ddl de- dea dec ded dee def del dfa dfc dfd dfe dff dfl dl- dla dlc dld dle dlf dll eaa eac ead eae eaf eal ec- eca ecc ecd ece ecf ecl ed- eda edc edd ede edf edl eea eec eed eee eef eel ef- efa efc efd efe eff efl ela elc eld ele elf ell faa fac fad fae faf fal fca fcc fcd fce fcf fcl fda fdc fdd fde fdf fdl fea fec fed fee fef fel ffa ffc ffd ffe fff ffl fla flc fld fle flf fll la- laa lac lad lae laf lal lca lcc lcd lce lcf lcl lda ldc ldd lde ldf ldl lea lec led lee lef lel lfa lfc lfd lfe lff lfl lla llc lld lle llf lll