#include<iostream>
#include<string>
using namespace std;
int main(){
    string str;
    getline(cin,str);
    string result="";
    string vowels="aeiouAEIOU";
    for(char ch : str)
    {
        if(!isalpha(ch)&& ch !=' '){
            cout<<"invalid input";
            return 0;
        }
        if(vowels.find(ch) == string::nops){
            result += ch;
        }
    }
    cout<<result;
    return 0;
}