#include<stdio.h>
FILE *g,*h;
using namespace std;
int main()
{
    g=fopen("text.in","r");
    h=fopen("text.out","w");
    int nrcuv=0,nrcar=0;
    char c,d;
    fscanf(g,"%c",&d);
    if(d>=65 && d<=90 || d>=97 && d<=122) nrcar++;
    while(!feof(g))
    {
        fscanf(g,"%c",&c);
        if(c>=65 && c<=90 || c>=97 && c<=122)
         {
             nrcar++;
             if(d=='-' || d==' ') nrcuv++;
         }
        d=c;
    }
   fprintf(h,"%d",nrcar/nrcuv);
   fclose(g);
   fclose(h);
}