2

#include <stdio.h>
int main()
{
    char ch[100];
    int i, count = 0;
    gets(ch);
    for (i = 0; ch[i] != '\0'; i++)
        if (!(ch[i] >= 'A' && ch[i] <= 'Z') && !(ch[i] >= 'a' && ch[i] <= 'z'))
            count++;
    printf("%d", count);
    return 0;
}