-th a-a a-c a-t aaa aac aah aat aay ac- aca acc ach act acy aha ahc ahh aht ahy at- ata atc ath att ay- aya ayc ayh ayt c-- caa cac cah cat cay cca ccc cch cct ch- cha chc chh cht chy cta ctc cth ctt cty cya cyc cyt haa hac hah hat hay hca hcc hch hct hcy hha hhc hhh hht hhy hta htc hth htt hty hy- hya hyc hyh hyt hyy taa tac tah tat tay tca tcc tch tct th- tha thc thh tht thy tta ttc tth ttt tty tya tyc tyt yaa yac yah yat yay yca ycc ych ycy yha yhc yht yta ytc yth ytt yyc yyt yyy