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