#include<stdio.h>
#include<ctype.h>

void highlight_vowels(char *s){
    char *vowels = "aeiouAEIOU";
    int valid = 1;
    for (int i = 0; s[i]; i++) {
        if(!isalpha(s[i])){
            valid = 0;
            break;
        }
        if(strchr(vowels, tolower(s[i])) !=NULL) {
            s[i] = toupper(s[i]);
        }
    }
    if (!valid){
        printf("Invalid input\n");
    } else {
        printf("%s\n", s);
    }
}

int main(){
    char s[101];
    fgets(s, sizeof(s), stdin);
    s[strcspn(s, "\n")] = 0; // remove newline highlight_vowels(s);
    return 0;
}