#include <fstream>
#include <string.h>
using namespace std;
int main()
{
    char s[200];
    int i,k=0,p=0;
    ifstream in("text.in");
    ofstream out("text.out");
    in.getline(s,200,'\n');
    in.close();
    int n=strlen(s);
    for(i=0;i<n;++i)
        if(isalpha(s[i]))
                k++;
        else if(isalpha(s[i+1])&&!isalpha(s[i]))
            p++;
    if(isalpha(s[0]))p++;
    out<<k/p;
    out.close();
    return 0;
}