// infoarena.ro - "TEXT" - 14.02.2009

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

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