#include<fstream.h>
#include<iomanip.h>
ifstream f("text.in");
ofstream g("text.out");
int ok;
unsigned long lung,cuv;

int main()
{char x;
f>>resetiosflags(ios::skipws)>>x;
while(x!='\n')
{if(((x>='a')&&(x<='z'))||((x>='A')&&(x<='Z'))){lung++;
						if(!ok){ok=1;cuv++;}
					       }
  else ok=0;
 f>>resetiosflags(ios::skipws)>>x;
}
f.close();
g<<lung/cuv<<'\n';
g.close();
return 0;
}