#include<stdio.h>
#include<ctype.h>
#include<string.h>
int main()
{
    char S[101];
    //scanf("%s", S);
     S[] = "abcdefghijklmnopqrstuvwxyz";
    for (int i = 0; S[i] != '\0'; i++)
    {
        if (!isalpha((unsigned char)S[i]))
        {
            printf("Invalid input");
            return 0;
        }
    }
    for (int i = 0; S[i] != '\0'; i++)
    {
        char ch = tolower((unsigned char)S[i]);
        if (ch == 'a' || ch == 'e' || ch == 'i' || ch == 'o' || ch == 'u')
        {
            printf("%c", toupper((unsigned char)S[i]));
        }
        else
        {
            printf("%c", S[i]);
        }
    }
    //printf("\n");
    return 0;
}