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

int main()
{
    ifstream fin ("text.in");
    ofstream fout ("text.out");
    char c;
    long k,cuv,l;
    l=0;
    k=0;
    cuv=0;
    while(fin.get(c))
    {

        if((c>='a'&c<='z')||(c>='A'&c<='Z'))
        {
            l++;
            k++;
            if(k==1)
                cuv++;
        }
        else k=0;
    }
    if(cuv!=0)
        fout<<l/cuv<<"\n";
    else fout<<"0"<<"\n";
    return 0;
}