-al a-a a-c a-t aaa aac aad aal aat ac- aca acc acd acl act ad- ada adc add adl adt al- ala alc ald all alt at- ata atc atd atl att c-- caa cac cad cal cat cca ccc ccd ccl cct cda cdc cdd cdl cdt cl- cla clc cld cll clt cta ctc ctd ctl ctt daa dac dad dal dat dca dcc dcd dcl dct dda ddc ddd ddl ddt dl- dla dlc dld dll dlt dta dtc dtd dtl dtt la- laa lac lad lal lat lca lcc lcd lcl lct lda ldc ldd ldl ldt lla llc lld lll llt lta ltc ltd ltl ltt taa tac tad tal tat tca tcc tcd tcl tct tda tdc tdd tdl tdt tla tlc tld tll tlt tta ttc ttd ttl ttt