#include <iostream>

using namespace std;

int main()
{
    char s[1001];
    cin.getline(s,1001);
    int i=0,nr=0,cv=1;
    while(s[i])
    {
        if( (s[i]>='a'&&s[i]<='z') || (s[i]>='A'&&s[i]<='Z') )
            nr++;
        else if(s[i]==' ') cv++;
        i++;
    }
    cout<<nr/cv;
    return 0;
}