#include<fstream>
#include<string.h>
using namespace std;
int main()
{
    char s[100];
    int i, contor=0,aux,cuvant=1;
    ifstream f("text.in");
    ofstream g("text.out");
    f.getline(s,100);
    for(i=0;i<strlen(s);i++)
       {if((s[i]>='a' && s[i]<='z')||(s[i]>='A' && s[i]<='Z'))
        contor++;
       if(s[i]==' ')
        cuvant++;}
    g<<contor/cuvant;
    return 0;
}