#include<bits/stdc++.h> using namespace std; string m[]={"vaporeon","jolteon","flareon","espeon","umbreon","leafeon","glaceon","sylveon"}; int len[]={8,7,7,6,7,7,7,7}; int main() { int n,ans; char s[20]; scanf("%d%s",&n,s); for(int i=0;i<8;i++) { if(len[i]==n) { int flag=0; for(int j=0;j<n;j++) { if(s[j]!='.'&&s[j]!=m[i][j]) { flag=1; break; } } if(flag==0) { ans=i; break; } } } cout<<m[ans]<<endl; printf(" "); return 0; }