-er eee eek eep eer eet eie eii eik eip eir eit eke eki ekp ekr ekt ep- epe epi epp epr ept ere eri erk erp err ert ete eti etk etp etr ett ie- iee iei iek iep ier iet iie iii iip iir iit ike iki ikk ikr ikt ipe ipi ipp ipr ipt ir- ire iri irk irp irr irt ite iti itk itp itt k-t ke- kee kei kek kep ker ket kie kii kik kip kir kit kke kki kkk kkp kkr kkt kpe kpi kpk kpp kpr kpt kri krk krp krr krt kte ktk ktp ktr ktt p-p pee pei pek pep per pet pie pii pik pip pir pit pke pki pkp pkr pkt ppe ppi ppk ppp ppr ppt pre pri prk prp prr prt pt- pte pti ptk ptp ptr ptt re- ree rei rek rep rer ret rie rii rik rip rir rit rke rkk rkp rkt rpe rpi rpk rpp rpr rpt rri rrk rrp rrr rrt rte rti rtk rtp rtr rtt te- tee tei tek tep ter tet tie tii tik tip tir tit tke tkk tkp tkr tkt tpe tpi tpk tpp tpr tpt tre tri trk trp trr trt tte tti ttk ttp ttr ttt