-al -ic a-a a-b a-c a-i a-t aaa aab aac aaf aai aak aal aat ab- aba abb abc abf abi abk abl abt ac- aca acb acc acf aci ack acl act af- afa afb afc aff afi afk afl aft ai- aia aib aic aif aii aik ail ait aka akb akc aki akk akl al- ala alb alc alf ali alk all alt at- ata atb atc atf ati atl att baa bab bac baf bai bak bal bat bba bbb bbc bbf bbi bbk bbl bbt bca bcb bcc bcf bci bck bcl bct bfa bfb bfc bff bfi bfl bft bi- bia bib bic bif bii bik bil bit bka bkb bkc bkf bkk bkl bkt bla blb blc blf bli blk bll blt bta btb btc btf bti btk btl btt c-- caa cab cac caf cai cak cal cat cba cbb cbc cbf cbi cbk cbl cbt cca ccb ccc ccf cci cck ccl cct cfa cfb cfc cff cfi cfk cfl cft ci- cia cib cic cif cii cik cil cit cka ckb ckc cki ckt cl- cla clb clc clf cli clk cll clt cta ctb ctc ctf cti ctk ctl ctt faa fab fac faf fai fak fal fat fba fbb fbc fbf fbi fbk fbl fbt fca fcb fcc fcf fci fck fcl fct ffa ffc fff ffi ffk ffl fft fia fib fic fif fii fik fil fit fka fkb fkc fkf fki fkk fkl fkt fla flb flc flf fli fll flt fta ftb ftc ftf fti ftk ftl ftt i-f ia- iaa iab iac iaf iai ial iat iba ibb ibc ibf ibi ibk ibl ibt ica icb icc icf ici ick icl ict ifa ifb ifc iff ifi ifl ift iia iib iic iif iii iil iit ika ikb ikc ikf iki ikk ikl ikt il- ila ilb ilc ilf ili ilk ill ilt ita itb itc itf iti itk itl itt k-t ka- kaa kab kac kaf kai kak kal kat kba kbb kbc kbf kbi kbk kbl kca kcb kcc kci kck kcl kct kfa kfc kff kfi kia kib kic kif kii kik kil kit kkb kkc kki kkk kkl kkt kl- kla klb klc klf kli klt kta ktb ktc ktf ktk ktl ktt la- laa lab lac laf lai lak lal lat lba lbb lbc lbf lbi lbk lbl lbt lca lcb lcc lcf lci lck lcl lct lfa lfb lfc lff lfi lfk lfl lft lia lib lic lif lii lik lil lit lka lkb lkl lkt lla llb llc llf lli llk lll llt lta ltb ltc ltf lti ltk ltl ltt taa tab tac taf tai tak tal tat tba tbb tbc tbf tbi tbk tbl tbt tca tcb tcc tcf tci tck tcl tct tfa tfb tfc tff tfi tfk tfl tft tia tib tic tif tii tik til tit tka tkb tkc tkk tkl tkt tla tlc tlf tli tlk tll tlt tta ttb ttc ttf tti ttk ttl ttt