#include <fstream>
#include <cstring>

using namespace std;

#define MAX 1001000

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

char s[MAX];
int n,i,j,k;

int main()
{
    fin.getline(s,MAX);
    s[strlen(s)]=' ';
    while(s[i])
    {
        if(isalpha(s[i]))
        {
            k++;
            while(isalpha(s[i]))
                i++, j++;
        }
        else
            i++;
    }
    fout << j/k;
    return 0;
}