/*  Problem Description
Write a program which does the following:
   * Takes a set of lines as input
   * Prints percentage of words containing vowels.
The input words will be in
    lower case. */

#include <iostream>
#include <string>
using namespace std;

int main() {
string s;
int vowelcount=0,wordcount=0;
while (cin >>s) {
if (0<=s.find("a")<=s.length() ||
   0<=s.find("e")<=s.length() ||
   0<=s.find("i")<=s.length() ||
   0<=s.find("o")<=s.length() ||
   0<=s.find("u")<=s.length()) vowelcount++;
wordcount++;
}
cout<<vowelcount;
cout <<vowelcount/wordcount*100 <<" %" <<endl;
cin.get();
cin.get();
return 0;
}