// infoarena.ro - "TEXT" - 14.02.2009

#include<fstream.h>
#include<stdio.h>

int main()
{
FILE *stream;
stream=fopen("text.in", "r+");
char c,ci='#';
long int nrl=0,nrc=0;
while (c!=EOF)
	{ c=fgetc(stream);
	  if ((c>='a' && c<='z') || (c>='A' && c<='Z'))
	     nrl++;
	     else
	     if ((ci>='a' && ci<='z') || (ci>='A' && ci<='Z'))
		nrc++;
	  ci=c;
	}
fclose(stream);
fstream g("text.out", ios::out);
g<<(int)(nrl/nrc)<<endl;
g.close();
return 0;
}