#include <iostream>
#include <fstream>

using namespace std;

ifstream fin("text.in");
ofstream fout("text.out");

int main()
{
    char pro[1000];
    int j = 1;
    fin>> pro;
    int v = strlen(pro);

   for (int i = 1; i < v; i++){
       if(pro[i] == ' '){
           j++;
       }
    }
  int lungimeMedie = (v - (j - 1) ) / j;
    fout<<lungimeMedie;

    return 0;
}