#include <fstream>

using namespace std;

int main()
{
    freopen("text.in","r",stdin);
    freopen("text.out","w",stdout);
    char c;
    int cuv=0;
    int nrl=0,nrc=0;
    while(scanf("%c",&c)!=EOF)
    {
       if((c>='A'&&c<='Z')||(c>='a'&&c<='z'))
        {
            nrl++;
            if(!cuv)
            {
                cuv=1;
                nrc++;

            }
        }
        else cuv=0;
    }

    printf("%d",nrl/nrc);
    return 0;
}