#include<stdio.h>
#include<string.h>

using namespace std;

FILE *f,*s;

char a,b,lit[200]="abcdefghijklmnopqrstuwvxyzABCDEFGHIJKLMNOPQRSTUVWXYZ",*c;
long long int nrc,nrl;

int main()
{
	f=fopen("text.in","r");
	s=fopen("text.out","w");
	
	b=0;
	nrl=0;
	nrc=0;
	while(!feof(f))
	{
		fscanf(f,"%c",&a);
		
		c=strchr(lit,a);
	
		
		if(c!=NULL)
		{	
			nrl++;
			
			if(b==0)
				nrc++;	
			
			b=1;
		}
		else
			b=0;	
		
	}
	
	if(nrc==0)
		fprintf(s,"0");
	else
		fprintf(s,"%lld",nrl/nrc);
	
	fclose(s);
	
	return 0;
}