#include <iostream>
#include <fstream>
using namespace std;
ifstream fin("text.in");
ofstream fout("text.out");
int isalpha(char c)
{
    if((c>='a' && c<='z') or (c>='A' && c<='Z'))
        return 1;
    return 0;
}
int main()
{
    char a,b='#';
    int i,lit=0,cnt=0;
    while(fin.get(a))
    {
        if(isalpha(b)==0 && isalpha(a)==1)
        {
            lit++;
            cnt++;
            b=a;
        }
        else
            if(isalpha(a))
            {
                lit++;
                b=a;
            }
            else
            {
                if(isalpha(b)==1 && isalpha(a)==0)
                {
                    b=a;
                }
            }
    }
    fout<<lit/cnt;
    return 0;
}