-er eee eek eem eep eer eet eie eii eik eim eip eir eit eke eki ekp ekr ekt em- eme emi emk emm emp emr emt ep- epe epi epm epp epr ept ere eri erk erm erp err ert ete eti etk etm etp etr ett ie- iee iei iek iem iep ier iet iie iii iim iip iir iit ike iki ikk ikr ikt im- ime imi imm imp imt ipe ipi ipm ipp ipr ipt ir- ire iri irk irm irp irr irt ite iti itk itm itp itt k-t ke- kee kei kek kem kep ker ket kie kii kik kim kip kir kit kke kki kkk kkm kkp kkr kkt kme kmi kmk kmm kmp kmt kpe kpi kpk kpm kpp kpr kpt kri krk krp krr krt kte ktk ktm ktp ktr ktt m-r mee mei mek mem mep mer met mi- mie mii mik mim mip mir mit mke mkk mkm mkp mkr mkt mme mmi mmk mmm mmp mmr mmt mpe mpi mpk mpm mpp mpr mpt mre mri mrk mrm mrp mrr mrt mte mti mtk mtm mtp mtr mtt p-p pee pei pek pem pep per pet pie pii pik pim pip pir pit pke pki pkm pkp pkr pkt pme pmi pmk pmm pmp pmr pmt ppe ppi ppk ppm ppp ppr ppt pre pri prk prm prp prr prt pt- pte pti ptk ptm ptp ptr ptt re- ree rei rek rem rep rer ret rie rii rik rim rip rir rit rke rkk rkm rkp rkt rme rmi rmm rmp rmr rmt rpe rpi rpk rpm rpp rpr rpt rri rrk rrm rrp rrr rrt rte rti rtk rtm rtp rtr rtt te- tee tei tek tem tep ter tet tie tii tik tim tip tir tit tke tkk tkm tkp tkr tkt tme tmi tmk tmm tmp tmr tmt tpe tpi tpk tpm tpp tpr tpt tre tri trk trm trp trr trt tte tti ttk ttm ttp ttr ttt