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

class StringProcessor{
    public:
    static string removeVowels(string str) {
        for(int i=0; i < str.length(); i++){
            if(!(str[i] >= 'a' && str[i] <= 'z')||
            (str[i] >= 'A' && str[i] <= 'A')||
            (str[i] == " ")){
                return "Invalid input";
            }
        }
        string result = "";
        for(int i=0; i<str.length(); i++){
            char ch = str[i];
            if(!(ch == 'a' || ch == 'e' || ch == 'i'||
            ch == 'o' || ch =='u'||
            ch == 'A' || ch == 'E' || ch == 'I' ||
            ch == 'O' || ch == 'U')){
                result += ch;
            }
        }
        return result;
    }
};
int main(){
    string str;
    getline(cin, str);
    
    cout<< StringProcessor::removeVowels(str);
    
    return 0;
}