-er eee eek eel eer eev eie eii eik eil eir eiv eke eki ekl ekr ekv ele eli elk ell elr elv ere eri erk erl err erv eve evi evl evr evv i-v ie- iee iei iek iel ier iev iie iii iil iir ike iki ikk ikl ikr ikv il- ile ili ilk ill ilr ilv ir- ire iri irk irl irr irv ive ivi ivl ivr ivv ke- kee kei kek kel ker kev kie kii kik kil kir kiv kke kki kkk kkl kkr kkv kl- kli klr klv kri krk krl krr krv kvi kvk kvr kvv lee lei lek lel ler lev lie lii lik lil lir liv lkl lkr lle lli llk lll llr llv lri lrk lrr lrv lve lvi lvl lvr lvv re- ree rei rek rel rer rev rie rii rik ril rir riv rke rkk rkv rle rli rll rlr rri rrk rrl rrr rve rvi rvl rvr rvv v-e vee vei vek vel ver vi- vie vii vik vil vir viv vl- vle vlk vll vlv vre vri vrk vrr vvi vvr vvv