#include <iostream>
#include <stdio.h>
#include <string.h>

using namespace std;

void rezolvare(FILE *,FILE *);

int main()
{
    FILE *f,*g;

    f=fopen("text.in","r");
    g=fopen("text.out","w");

    rezolvare(f,g);

    fclose(f);
    fclose(g);

    return 0;
}

void rezolvare(FILE *f,FILE *g)
{
    int letter=0;
    int words=0;

    char x;

    while((x=fgetc(f))!=EOF)
    {
        if((x>='a' && x<='z')||(x>='A' && x<='Z'))
            ++letter;

        if(x==' ' || x=='-')
            ++words;

    }

//    cout <<words<<" "<<letter<<endl;

  //  cout<<letter/words;

    fprintf(g,"%d",letter/words);

}