#include <stdio.h>
#include <stdlib.h>
#include <math.h>
int main()
{



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



    int characters=0,c=0,k=0;
    char litera;

    while(fscanf(f,"%c",&litera)!=EOF)
    {
        if((litera >='a' && litera <='z') || (litera >='A' && litera <='Z'))
        {


            c++;
            if(k==0)


            {
                characters++;
                k = 1;
            }
        }
        else

        {
            k=0;
        }
    }


    k = c/(characters);
    fprintf(g,"%d",k);
    return 0;
}