-er eee eel eep eer eev eie eii eil eip eir eiv ele eli ell elp elr elv ep- epe epi epl epp epr ere eri erl erp err erv eve evi evl evp evr evv i-v ie- iee iei iel iep ier iev iie iii iil iip iir il- ile ili ill ilp ilr ilv ipe ipi ipl ipp ipr ipv ir- ire iri irl irp irr irv ive ivi ivl ivp ivr ivv l-p lee lei lel lep ler lev lie lii lil lip lir liv lle lli lll llp llr llv lpe lpi lpl lpp lpr lpv lri lrp lrr lrv lve lvi lvl lvp lvr lvv p-p pee pei pel pep per pev pie pii pil pip pir piv ple pli pll plp plr plv ppe ppi ppl ppp ppr ppv pre pri prl prp prr prv pve pvi pvl pvp pvr pvv re- ree rei rel rep rer rev rie rii ril rip rir riv rle rli rll rlp rlr rpe rpi rpl rpp rpr rpv rri rrl rrp rrr rve rvi rvl rvp rvr rvv v-e vee vei vel vep ver vi- vie vii vil vip vir viv vl- vle vll vlp vlv vpe vpi vpl vpp vpr vre vri vrp vrr vvi vvr vvv