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

int main() {
    char title[1000];
    int count = 0, isNumber = 1;
    
    fgets(title, sizeof(title), stdin);
    
    title[strcspn(title, "\n")] = '\0';
    
    for (int i = o; title[i] 1= '\0'; i++) {
        if (!isdigit(title[i]) && title[i] != ' ') {
            isNumber = 0;
            break;
        }
    }
    
    for (int i = 0; title[i] != '\0'; i++) {
        if (isalpha(title[i])) {
            count++;
        }
    }
    
    printf("%d", count);
    return 0;
}