#include <stdio.h>
int main()
{ char x,i;
  int car=0,cuv=0,ok,k=1;
FILE*f=fopen("text.in","r");
FILE*g=fopen("text.out","w");
while(!feof(f))
	{
	fscanf(f,"%c",&x);
	ok=0;
	for (i='a';i<='z';i++)
		if (i==x) { ok=1; break;}
	if (ok==0) for (i='A';i<='Z';i++)
			if (i==x) { ok=1; break;}
	if (ok==1) { car++; if(k==1)cuv++; k=0;}
	else k=1;
	}
fprintf(g,"%d",car/cuv);
return 0;
}