#include <iostream>
#include <fstream>
using namespace std;
ifstream fin("text.in");
ofstream fout("text.out");
char c;
long long k,cuv,l;
int main()
{
    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;
}