#include <fstream>
using namespace std;
ifstream f("text.in");
ofstream g("text.out");
int c,l,p;
char x;
int main()
{
while(f.get(x))
if(isalpha(x))
l++,p=1;
else if(p==1)
p=0,c++;
g<<l/c;
return 0;
}