-er a-a a-t aaa aae aaf aak aap aar aat aea aee aef aek aep aer aet af- afa afe aff afk afp afr aft aka ake akk akp akr ap- apa ape apf apk app apr apt ar- ara are arf ark arp arr art at- ata ate atf atp atr att eaa eae eaf eak eap ear eat eea eee eef eek eep eer eet ef- efa efe eff efp efr eft eka eke ekf ekp ekr ekt ep- epa epe epf epp epr ept era ere erf erk erp err ert eta ete etf etk etp etr ett faa fae faf fak fap far fat fea fee fef fek fep fer fet ffa ffe fff ffk ffp ffr fft fka fkf fkk fkp fkt fpa fpe fpk fpp fpr fpt fra fre frf frk frp frr frt fta fte ftf ftk ftp ftr ftt k-t ka- kaa kae kaf kak kap kar kat ke- kea kee kef kek kep ker ket kfa kff kke kkk kkp kkr kkt kpa kpe kpf kpk kpp kpr kpt kra krf krk krp krr krt kta kte ktf ktk ktp ktr ktt p-p paa pae paf pak pap par pat pea pee pef pek pep per pet pfa pfe pff pfk pfp pfr pft pka pke pkf pkp pkr pkt ppa ppe ppf ppk ppp ppr ppt pra pre prf prk prp prr prt pt- pta pte ptf ptk ptp ptr ptt ra- raa rae raf rak rap rar rat re- rea ree ref rek rep rer ret rfa rfe rff rfk rfp rfr rft rke rkf rkk rkp rkt rpa rpe rpf rpk rpp rpr rpt rra rrf rrk rrp rrr rrt rta rte rtf rtk rtp rtr rtt taa tae taf tak tap tar tat te- tea tee tef tek tep ter tet tfa tfe tff tfk tfp tfr tft tka tke tkk tkp tkr tkt tpa tpe tpf tpk tpp tpr tpt tra tre trf trk trp trr trt tta tte ttf ttk ttp ttr ttt