#include<stdio.h>
#include<stdlib.h>
int ok,k,z;
int main()
{
    char s;
    FILE*f=fopen("text.in","r");
    FILE*g=fopen("text.in","w");
    while(!feof(f))
    {
        fscanf(f,"%c",&s);
        if((s>='a'&&s<='z')||(s>='A'&&s<='Z')) k++;
        else
        {
            if(k) ok++;
            z+=k;
            k=0;
        }
    }
    z/=ok;
    fprintf(g,"%d",z);
    fclose(f);
    fclose(g);
    return 0;
}