-al -ol a-a a-c a-t aaa aac aad aal aao aat ac- aca acc acd acl aco act ad- ada adc add adl ado adt al- ala alc ald all alo alt aoa aoc aod aol aoo aot at- ata atc atd atl ato att c-- caa cac cad cal cao cat cca ccc ccd ccl cco cct cda cdc cdd cdl cdo cdt cl- cla clc cld cll clo clt co- coa coc cod col coo cot cta ctc ctd ctl cto ctt daa dac dad dal dao dat dca dcc dcd dcl dco dct dda ddc ddd ddl ddo ddt dl- dla dlc dld dll dlo dlt doa doc dod dol doo dot dta dtc dtd dtl dto dtt la- laa lac lad lal lao lat lca lcc lcd lcl lco lct lda ldc ldd ldl ldo ldt lla llc lld lll llo llt loa loc lod lol loo lot lta ltc ltd ltl lto ltt oaa oac oad oal oao oat oc- oca occ ocd ocl oco oct oda odc odd odl odo odt ola olc old oll olo olt oo- ooa ooc ood ool ooo oot ot- ota otc otd otl oto ott taa tac tad tal tao tat tca tcc tcd tcl tco tct tda tdc tdd tdl tdo tdt tla tlc tld tll tlo tlt to- toa toc tod tol too tot tta ttc ttd ttl tto ttt