#include<fstream.h>
int litera(char c)
{
	if(c>='a'&&c<='z' || c>='A'&&c<='Z')return 1;
	return 0;
}
int main()
{
	ifstream f("text.in");
	ofstream g("text.out");
	char a,b,c;
	int lgt=0,nrc=0,nr;
	f.get(b);
	if(litera(b))lgt=1;
	while(f.get(c))
	{a=b;b=c;
	 if(litera(c))lgt++;
	 if(litera(a)&&!litera(b))nrc++;
	}
	if(litera(b))nrc++;
	nr=lgt/nrc;
	g<<nr<<'\n';
}