#include<cstring>
#include<fstream>
using namespace std;
ifstream fin("text.in");
ofstream fout("text.out");
char s[100];
int litera(char x)
{
    if((x>='a' and x<='z') or (x>='A' and x<='Z'))
        return 1;
    else return 0;
}
int main()
{   int i,l,nr=0,nr2=0;
    fin.get(s,100);
    l=strlen(s);
    i=0;
    while(i<l)
    {
        if(litera(s[i])==1)
           {    nr2++;
               if(litera(s[i+1])==0)
                nr++;
           }
        i++;
    }
    fout<<nr2/nr;
}