#include <stdio.h>
#include <stdlib.h>
#include <fstream>
#include <iostream>
#include <string.h>
using namespace std;



int main()
{

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

    char *c, s[13]="\n;:-_.,/!? ", s2[4]="\n ", *r;
    int sum=0, nc=0;
    c=(char*)calloc(1, 125000);
    fgets(c, 125000, f);
    r=strtok(c, s);
    while(r!=NULL)
    {
        sum+=strlen(r);
        nc++;
        r=strtok(NULL, s);
    }
    g<<sum/nc;
    return 0;
}