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

ifstream fin("text.in");
ofstream fout("text.out");
int ok=0,l=0,cuv=0;
char c;
int main()
{
    while(fin.get(c))
    {
        if((c>='a' && c<='z') || (c>='A' && c<='Z'))
        {
            ok=1;
            l++;

        }
        else if(ok==1)
        {
            cuv++;
            ok=0;
        }
    }

    //fout<<l<<"\n"<<cuv<<"\n";
    if(cuv==0)
        fout<<"0";
    else
        fout<<l/cuv;

    return 0;
}