#include <fstream>
#include <string.h>
#include <ctype.h>
using namespace std;
ifstream fin("text.in", ifstream::in);
ofstream fout("text.out", ofstream::out);

char stri[100000];
int lungimetotal;
int numarcuvinte;

int main()
{
    int z=0;
    int k = 0;
    lungimetotal = 0; numarcuvinte = 0;
    k = 0;
    while (!fin.eof())
    {
    stri[z] = fin.get();
    if (isalpha(stri[z]))
    {
                        lungimetotal++;
                        if (k == 0)
                        numarcuvinte++;
                        k = 1;
    }
    else
    {
      k = 0;    
    }                        
    }
    fout << (int)lungimetotal / numarcuvinte;
    return 0;
}