#include <fstream>
#include <string.h>

using namespace std;

int main()
{
    ifstream in("text.in");
    ofstream out("text.out");
    char val;
    int cnt=0,length=0;
    bool valid=0;
    while(!in.eof())
    {
        in.get(val);
        if((val>='a' && val<='z') || (val>='A' && val<='Z'))
        {
            if(valid==0)
            {
                cnt++;
                valid=1;
            }
            length++;
        }
        else valid=0;
    }
    out<<length/cnt;
    return 0;
}