#include<stdio.h>
#include<string.h>
int main()
{
    int i,a,count;
    char str[10000];
    while(gets(str))
    {
        count=0;
        for(i=0; str[i]!='\0'; i++)
        {
            if(str[i]!=' '&&!((str[i]>=33&&str[i]<=64)||(str[i]>=91&&str[i]<=96)||(str[i]>=123&&str[i]<=126)))
            {
                count++;
            }
            while(str[i]!=' '&&!((str[i]>=33&&str[i]<=64)||(str[i]>=91&&str[i]<=96)||(str[i]>=123&&str[i]<=126)))
            {
                    i++;
            }
        }
        printf("%d\n",count);
    }
    return 0;
}