// editor1
#include<stdio.h>
#include<string.h>
#include<ctype.h>
int main()
{
    char s[105];
    fgets(s,sizeof(s),stdin);
    int n=strlen(s);
    if(s[n-1]=='\n')
    {
        s[n-1]='\0';
        n--;
    }
    int seen[256]={0};
    char result[105];
    int k=0;
    for(int i=0;i<n;i++)
    {
        char c=s[i];
        if(!(isalpha(c)||c==' '))
        {
            printf("Invalid input\n");
            return 0;
        }
        if(c==' ')
           continue;
        char lower =tolower(c);
        if(isupper(c)||lower=='a'||lower=='e'||lower=='i'||lower='o'||lower='u')
        {
            if(!seen[(unsigned char)lower])
            {
                result[k++]=c;
                seen[(unsigned char)lower]=1;
            }
        }
    }
    result[k]='\0';
    printf("%s\n",result);
    return 0;
}