-al a-a a-b a-c a-t aaa aab aac aad aae aal aas aat ab- aba abb abc abd abe abl abs abt ac- aca acb acc acd ace acl acs act ad- ada adb adc add ade adl ads adt aea aeb aec aed aee ael aes aet al- ala alb alc ald ale all als alt as- asa asb asc asd ase asl ass ast at- ata atb atc atd ate atl ats att baa bab bac bad bae bal bas bat bba bbb bbc bbd bbe bbl bbs bbt bca bcb bcc bcd bce bcl bcs bct bda bdb bdc bdd bde bdl bds bdt be- bea beb bec bed bee bel bes bet bla blb blc bld ble bll bls blt bsa bsb bsc bsd bse bsl bss bst bta btb btc btd bte btl bts btt c-- caa cab cac cad cae cal cas cat cba cbb cbc cbd cbe cbl cbs cbt cca ccb ccc ccd cce ccl ccs cct cda cdb cdc cdd cde cdl cds cdt ce- cea ceb cec ced cee cel ces cet cl- cla clb clc cld cle cll cls clt csa csb csc csd cse csl css cst cta ctb ctc ctd cte ctl cts ctt daa dab dac dad dae dal das dat dba dbb dbc dbd dbe dbl dbs dbt dca dcb dcc dcd dce dcl dcs dct dda ddb ddc ddd dde ddl dds ddt de- dea deb dec ded dee del des det dl- dla dlb dlc dld dle dll dls dlt dsa dsb dsc dsd dse dsl dss dst dta dtb dtc dtd dte dtl dts dtt eaa eab eac ead eae eal eas eat eba ebb ebc ebd ebe ebl ebs ebt ec- eca ecb ecc ecd ece ecl ecs ect ed- eda edb edc edd ede edl eds edt eea eeb eec eed eee eel ees eet ela elb elc eld ele ell els elt es- esa esb esc esd ese esl ess est eta etb etc etd ete etl ets ett la- laa lab lac lad lae lal las lat lba lbb lbc lbd lbe lbl lbs lbt lca lcb lcc lcd lce lcl lcs lct lda ldb ldc ldd lde ldl lds ldt lea leb lec led lee lel les let lla llb llc lld lle lll lls llt lsa lsb lsc lsd lse lsl lss lst lta ltb ltc ltd lte ltl lts ltt saa sab sac sad sae sal sas sat sba sbb sbc sbd sbe sbl sbs sbt sca scb scc scd sce scl scs sct sda sdb sdc sdd sde sdl sds sdt se- sea seb sec sed see sel ses set sla slb slc sld sle sll sls slt ss- ssa ssb ssc ssd sse ssl sss sst sta stb stc std ste stl sts stt taa tab tac tad tae tal tas tat tba tbb tbc tbd tbe tbl tbs tbt tca tcb tcc tcd tce tcl tcs tct tda tdb tdc tdd tde tdl tds tdt te- tea teb tec ted tee tel tes tet tla tlc tld tle tll tls tlt tsa tsb tsc tsd tse tsl tss tst tta ttb ttc ttd tte ttl tts ttt