-al a-a a-b a-c a-t aaa aab aac aad aae aak aal aat ab- aba abb abc abd abe abk abl abt ac- aca acb acc acd ace ack acl act ad- ada adb adc add ade adk adl adt aea aeb aec aed aee aek ael aet aka akb akc akd ake akk akl al- ala alb alc ald ale alk all alt at- ata atb atc atd ate atl att baa bab bac bad bae bak bal bat bba bbb bbc bbd bbe bbk bbl bbt bca bcb bcc bcd bce bck bcl bct bda bdb bdc bdd bde bdk bdl bdt be- bea beb bec bed bee bek bel bet bka bkb bkc bke bkk bkl bkt bla blb blc bld ble blk bll blt bta btb btc btd bte btk btl btt c-- caa cab cac cad cae cak cal cat cba cbb cbc cbd cbe cbk cbl cbt cca ccb ccc ccd cce cck ccl cct cda cdb cdc cdd cde cdk cdl cdt ce- cea ceb cec ced cee cek cel cet cka ckb ckc ckd ckt cl- cla clb clc cld cle clk cll clt cta ctb ctc ctd cte ctk ctl ctt daa dab dac dad dae dak dal dat dba dbb dbc dbd dbe dbk dbl dbt dca dcb dcc dcd dce dck dcl dct dda ddb ddc ddd dde ddk ddl ddt de- dea deb dec ded dee dek del det dka dkb dkc dke dkk dkl dkt dl- dla dlb dlc dld dle dlk dll dlt dta dtb dtc dtd dte dtk dtl dtt eaa eab eac ead eae eak eal eat eba ebb ebc ebd ebe ebk ebl ebt ec- eca ecb ecc ecd ece eck ecl ect ed- eda edb edc edd ede edk edl edt eea eeb eec eed eee eek eel eet eka ekb ekc ekd eke ekl ekt ela elb elc eld ele elk ell elt eta etb etc etd ete etk etl ett k-t ka- kaa kab kac kad kae kak kal kat kba kbb kbc kbd kbe kbk kbl kca kcb kcc kcd kce kck kcl kct kda kdb kdc kde kdk kdl kdt ke- kea keb kec ked kee kek kel ket kkb kkc kke kkk kkl kkt kl- kla klb klc kld klt kta ktb ktc kte ktk ktl ktt la- laa lab lac lad lae lak lal lat lba lbb lbc lbd lbe lbk lbl lbt lca lcb lcc lcd lce lck lcl lct lda ldb ldc ldd lde ldk ldl ldt lea leb lec led lee lek lel let lka lkb lkl lkt lla llb llc lld lle llk lll llt lta ltb ltc ltd lte ltk ltl ltt taa tab tac tad tae tak tal tat tba tbb tbc tbd tbe tbk tbl tbt tca tcb tcc tcd tce tck tcl tct tda tdb tdc tdd tde tdk tdl tdt te- tea teb tec ted tee tek tel tet tka tkb tkc tke tkk tkl tkt tla tlc tld tle tlk tll tlt tta ttb ttc ttd tte ttk ttl ttt