using namespace std;
#include<cstdio>
#include<fstream>
#include<cctype>
char c;
FILE *f;
int nrc,nrl;

int main()
{
	f=fopen("text.in","r");
	freopen("text.out","w",stdout);
	fscanf(f,"%c",&c);
	while(!isalpha(c) && !feof(f)) fscanf(f,"%c",&c);
	nrc=1;
	while(!feof(f))
	{
		if(isalpha(c)) {nrl++; fscanf(f,"%c",&c); }
		else 
		{
			while(!isalpha(c) && !feof(f)) fscanf(f,"%c",&c);
			if(isalpha(c)) nrc++; 
		}
	}
	printf("%d\n",nrl/nrc);
	fclose(f);
	return 0;
}