-er -th a-a a-c a-t aaa aac aae aah aak aar aat ac- aca acc ace ach ack acr act aea aec aee aeh aek aer aet aha ahc ahe ahh ahk ahr aht aka akc ake akh akk akr ar- ara arc are arh ark arr art at- ata atc ate ath atr att c-- caa cac cae cah cak car cat cca ccc cce cch cck ccr cct ce- cea cec cee ceh cek cer cet ch- cha chc che chh chk chr cht cka ckc ckh ckt cra crc cre crh crk crr crt cta ctc cte cth ctk ctr ctt eaa eac eae eah eak ear eat ec- eca ecc ece ech eck ecr ect eea eec eee eek eer eet eha ehc ehe ehh ehr eht eka ekc eke ekh ekr ekt era erc ere erh erk err ert eta etc ete eth etk etr ett haa hac hae hah hak har hat hca hcc hce hch hck hcr hct he- hea hec hee heh hek her het hha hhc hhe hhh hhk hhr hht hka hkh hkk hkr hkt hr- hra hrc hre hrh hrk hrr hrt hta htc hte hth htk htr htt k-t ka- kaa kac kae kah kak kar kat kca kcc kce kch kck kcr kct ke- kea kec kee keh kek ker ket kha khe khh khk khr kkc kke kkh kkk kkr kkt kra krc krk krr krt kta ktc kte kth ktk ktr ktt ra- raa rac rae rah rak rar rat rca rcc rce rch rcr rct re- rea rec ree reh rek rer ret rh- rha rhc rhe rhh rhr rht rkc rke rkk rkt rra rrc rrh rrk rrr rrt rta rtc rte rtk rtr rtt taa tac tae tah tak tar tat tca tcc tce tch tck tcr tct te- tea tec tee teh tek ter tet th- tha thc the thh thk thr tht tka tkc tke tkk tkr tkt tra trc tre trh trk trr trt tta ttc tte tth ttk ttr ttt