#include<iostream.h>
#include<fstream.h>
int main()
{char a,b,c;
int nr=0,nr1=0,s;
ifstream f("text.in");
ofstream g("text.out");
f.get(b);
if((b>='a' && b<='z')||(b>='A' && b<='Z'))nr1++;
while(!f.eof())
{
f.get(a);
if((a>='a' && a<='z')||(a>='A' && a<='Z'))nr1++;

if((a>='a' && a<='z')||(a>='A' && a<='Z'))
 if(!((b>='a' && b<='z')||(b>='A' && b<='Z')))nr++;
b=a;
}
s=nr1/nr;

g<<s<<endl;
f.close();
g.close();
return 0;
}