#include<fstream>
#include<cstring>
using namespace std;
int main()
{
    char c[1000];
    int e=0,l=0,cuv=0;
    ifstream fin("text.in");
    ofstream fout("text.out");
    fin.get(c,1000);
    for(int a=1;a<strlen(c);a++)
    {
        if((c[a]>='a' and c[a]<='z') or (c[a]>='A' and c[a]<='Z'))
        {
            l++;
            if(e==0)
            {
                e=1;
                cuv++;
            }
        }
        else e=0;
    }
    fout<<l/cuv;
}