#include<iostream.h>
#include<fstream.h>
int main()
{
 ifstream f("text.in");
 ofstream g("text.out");
 char a;
 unsigned long nr=0,nr1=0,s;
 while(f>>a)
 {
  if((a>='a' && a<='z') || (a>='A' &&a<='Z'))
    nr++;
    else
    nr1++;
  }
 s=nr/nr1;
 g<<s;
f.close();
g.close();  return 0;
}