#include<fstream>
#include<string.h>
using namespace std;
ifstream f("text.in");
ofstream g("text.out");
char sir[10000],sep[]=" .,;:-?!123456789";
long nrc=0,nrl=0,i,p;
int main()
{
	f.get(sir,1000);
	i=0;
	while(sir[i])
	{	
		if(strchr(sep,sir[i])==0)
			nrl++;
		i++;
	}
	i=0;
	while(sir[i]){
		if(strchr(sep,sir[i])==0)
			if(strchr(sep,sir[i-1])!=0)
				nrc++;
		i++;
	}
	p=nrl/nrc;
	g<<p;
	f.close();
	g.close();
	return 0;
	
}