#include<iostream>
using namespace std;
#include<stdio.h>
#include<string.h>
FILE *f,*g;
char s[1000001],s1[1000001];
unsigned long n,lungime,nrcuvinte=1,i,j,lungimemedie,x;;
int main()
{
    f=fopen("text.in","r");
    g=fopen("text.out","w");
    while(!feof(f))
    {
        fgets(s1,100,f);
        n=strlen(s);
        strcpy(s+n,s1);
        n=strlen(s);
    }
    for(i=0;i<n;i++)
    if(s[i]=='\n')
    s[i]=' ';

for(i=0;i<n;i++)
if((s[i]>='a'&&s[i]<='z')||(s[i]>='A'&&s[i]<='Z'))
lungime++;
else
nrcuvinte++;
fprintf(g,"%lud",lungime/nrcuvinte);
}