-er eee eek eel eep eer eie eii eik eil eip eir eke eki ekl ekp ekr ele eli elk ell elp elr ep- epe epi epl epp epr ere eri erk erl erp err ie- iee iei iek iel iep ier iie iii iil iip iir ike iki ikk ikl ikr il- ile ili ilk ill ilp ilr ipe ipi ipl ipp ipr ir- ire iri irk irl irp irr ke- kee kei kek kel kep ker kie kii kik kil kip kir kke kki kkk kkl kkp kkr kl- kli klr kpe kpi kpk kpl kpp kpr kri krk krl krp krr l-p lee lei lek lel lep ler lie lii lik lil lip lir lkl lkp lkr lle lli llk lll llp llr lpe lpi lpk lpl lpp lpr lri lrk lrp lrr p-p pee pei pek pel pep per pie pii pik pil pip pir pke pki pkl pkp pkr ple pli plk pll plp plr ppe ppi ppk ppl ppp ppr pre pri prk prl prp prr re- ree rei rek rel rep rer rie rii rik ril rip rir rke rkk rkp rle rli rll rlp rlr rpe rpi rpk rpl rpp rpr rri rrk rrl rrp rrr