#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 :: npos)
        {
            result+=ch;
        }
    }
    cout<<result;
    return 0;
}