-er a-a a-t aaa aae aak aao aar aat aea aee aek aeo aer aet aka ake akk ako akr aoa aoe aok aoo aor aot ar- ara are ark aro arr art at- ata ate ato atr att eaa eae eak eao ear eat eea eee eek eeo eer eet eka eke eko ekr ekt eo- eoa eoe eok eoo eor eot era ere erk ero err ert eta ete etk eto etr ett k-t ka- kaa kae kak kao kar kat ke- kea kee kek keo ker ket kke kkk kkr kkt koa koe kok koo kor kot kra krk kro krr krt kta kte ktk kto ktr ktt oaa oae oak oao oar oat oea oee oeo oer oet oka oke okk oko okr oo- ooa ook ooo oor oot or- ora ore ork oro orr ort ot- ota ote otk oto otr ott ra- raa rae rak rao rar rat re- rea ree rek reo rer ret rke rkk rko rkt roa roe rok roo ror rot rra rrk rrr rrt rta rte rtk rto rtr rtt taa tae tak tao tar tat te- tea tee tek teo ter tet tka tke tkk tko tkr tkt to- toa toe tok too tor tot tra tre trk tro trr trt tta tte ttk tto ttr ttt