#include<fstream>
#include<cstring>
using namespace std;
ifstream f("text.in");
ofstream g("text.out");
int con,imp=1,n;
char x[100001];
int main()
{
    f.getline(x,100001);
    n=strlen(x);
    for(int i=0;i<n;i++)
      if(x[i]>='a'&&x[i]<='z'||x[i]>='A'&&x[i]<='Z')
        con++;
      else if(x[i]==' ')
        imp++;
    //g<<con<<" "<<imp<<"\n";
    g<<con/imp;
    return 0;
}