// Example program
#include <iostream>
#include <string.h>
#include <fstream>
using namespace std;
ifstream f("text.in");
ofstream o("text.out");
int avg,len,wordc;
char *pok,text[1024*1024 +1];
int main()
{
    f.getline(text,1024*1024 +1);
    //cin.get();
    pok=strtok(text," ,.-_;:()!?`1234*@#$%^&567890'[]{}=+\|/<>");
    while(pok!=NULL)
    {
    len+=strlen(pok);
    wordc++;
    pok=strtok(NULL," ,.-_;:()!?`1234*@#$%^&567890'[]{}=+\|/<>");
    }
    avg=len/wordc;
    //cout<<len<<wordc;
    o<<avg;
return 0;
}