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

 int main(){
     string s;
     getline(cin, s);
      
      for(char c:s){
          if (!isalpha(c)  && c!=''){
              cout << "invalid input";
              return 0;
          }
      }
      int ciunt = 0;
      string vowels = "aeiouAEIOU";
      for(char c:s){
          if (vowels.find(c != string::npos){
              count++;
          }
      }
      count<<count;
      return 0;
 }