#include <stdio.h>

int main() {
    char ch;
    int vowelCount = 0;

    printf("Enter a stream of characters:\n");

    while ((ch = getchar()) != '\n') {
        if (ch == 'a' || ch == 'e' || ch == 'i' || ch == 'o' || ch == 'u' ||
            ch == 'A' || ch == 'E' || ch == 'I' || ch == 'O' || ch == 'U') {
            vowelCount++;
        }
    }

    printf("Number of vowels: %d\n", vowelCount);

    return 0;
}