#include <iostream>
#include <bits/stdc++.h>
#include <fstream>
using namespace std;
ifstream f("text.in");
ofstream g("text.out");
string s;
char x;
void citire()
{

    for (int i=0;i<=s.size();i++)
        f>>s[i];
}
int Numara ()
{
    for (int i=0; i<=s.size();i++)
    {
        x=s[i];
        if(isalpha(x,i)==0)
            nr++;
    }
    return nr;
}

int main()
{
    citire();
    int n=Numara();
    g<<n;
    return 0;
}