#include <iostream>
#include <fstream>
#include <string.h>
using namespace std;

int main()
{
    ifstream f("text.in");
    ofstream g("text.out");
    char s,p;
    int n,cuv,lit,x;
    cuv=0;
    lit=0;
    do{
        f.get(s);
        if((s>='a'&&s<='z')||(s>='A'&&s<='Z')){
            lit++;
        }
        if(!((s>='a' && s<='z') || (s>='A' && s<='Z'))and(p>='a' && p<='z') || (p>='A' && p<='Z')){
            cuv++;
        }
        p=s;
    }while(!f.eof());
    n=lit/cuv;
    g<<n;
    return 0;
}