-al a-a a-b a-c a-t aaa aab aac aad aae aaf aal aat ab- aba abb abc abd abe abf abl abt ac- aca acb acc acd ace acf acl act ad- ada adb adc add ade adf adl adt aea aeb aec aed aee aef ael aet af- afa afb afc afd afe aff afl aft al- ala alb alc ald ale alf all alt at- ata atb atc atd ate atf atl att baa bab bac bad bae baf bal bat bba bbb bbc bbd bbe bbf bbl bbt bca bcb bcc bcd bce bcf bcl bct bda bdb bdc bdd bde bdf bdl bdt be- bea beb bec bed bee bef bel bet bfa bfb bfc bfd bfe bff bfl bft bla blb blc bld ble blf bll blt bta btb btc btd bte btf btl btt c-- caa cab cac cad cae caf cal cat cba cbb cbc cbd cbe cbf cbl cbt cca ccb ccc ccd cce ccf ccl cct cda cdb cdc cdd cde cdf cdl cdt ce- cea ceb cec ced cee cef cel cet cfa cfb cfc cfd cfe cff cfl cft cl- cla clb clc cld cle clf cll clt cta ctb ctc ctd cte ctf ctl ctt daa dab dac dad dae daf dal dat dba dbb dbc dbd dbe dbf dbl dbt dca dcb dcc dcd dce dcf dcl dct dda ddb ddc ddd dde ddf ddl ddt de- dea deb dec ded dee def del det dfa dfb dfc dfd dfe dff dfl dft dl- dla dlb dlc dld dle dlf dll dlt dta dtb dtc dtd dte dtf dtl dtt eaa eab eac ead eae eaf eal eat eba ebb ebc ebd ebe ebf ebl ebt ec- eca ecb ecc ecd ece ecf ecl ect ed- eda edb edc edd ede edf edl edt eea eeb eec eed eee eef eel eet ef- efa efb efc efd efe eff efl eft ela elb elc eld ele elf ell elt eta etb etc etd ete etf etl ett faa fab fac fad fae faf fal fat fba fbb fbc fbd fbe fbf fbl fbt fca fcb fcc fcd fce fcf fcl fct fda fdb fdc fdd fde fdf fdl fdt fea feb fec fed fee fef fel fet ffa ffc ffd ffe fff ffl fft fla flb flc fld fle flf fll flt fta ftb ftc ftd fte ftf ftl ftt la- laa lab lac lad lae laf lal lat lba lbb lbc lbd lbe lbf lbl lbt lca lcb lcc lcd lce lcf lcl lct lda ldb ldc ldd lde ldf ldl ldt lea leb lec led lee lef lel let lfa lfb lfc lfd lfe lff lfl lft lla llb llc lld lle llf lll llt lta ltb ltc ltd lte ltf ltl ltt taa tab tac tad tae taf tal tat tba tbb tbc tbd tbe tbf tbl tbt tca tcb tcc tcd tce tcf tcl tct tda tdb tdc tdd tde tdf tdl tdt te- tea teb tec ted tee tef tel tet tfa tfb tfc tfd tfe tff tfl tft tla tlc tld tle tlf tll tlt tta ttb ttc ttd tte ttf ttl ttt