#include <fstream>
#include <string.h>
using namespace std;
ifstream in("text.in");
ofstream out("text.out");
int main()
{
    char s[100000];
    int i,k=0,p=0;
    in.getline(s,100000,NULL);
    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;
    return 0;
}