-th a-a a-c a-t aaa aac aad aah aan aat ac- aca acc acd ach acn act ad- ada adc add adh adn adt aha ahc ahd ahh ahn aht an- ana anc and anh ann ant at- ata atc atd ath atn att c-- caa cac cad cah can cat cca ccc ccd cch ccn cct cda cdc cdd cdh cdn cdt ch- cha chc chd chh chn cht cn- cna cnc cnd cnh cnn cnt cta ctc ctd cth ctn ctt daa dac dad dah dan dat dca dcc dcd dcn dct dda ddc ddd ddh ddn ddt dh- dha dhc dhd dhh dht dna dnc dnd dnh dnn dnt dta dtc dtd dth dtn dtt haa hac had hah han hat hca hcc hcd hch hcn hct hda hdc hdd hdh hdn hdt hha hhc hhd hhh hhn hht hna hnc hnd hnh hnn hnt hta htc htd hth htn htt naa nac nad nah nan nat nca ncc ncd nch ncn nct nda ndc ndd ndh ndn ndt nha nhc nhd nhh nhn nht nna nnc nnh nnn nnt nta ntc ntd nth ntn ntt taa tac tad tah tan tat tca tcc tcd tch tcn tct tda tdc tdd tdh tdn tdt th- tha thc thd thh thn tht tna tnc tnd tnh tnn tnt tta ttc ttd tth ttn ttt