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

int i,j,n,l,k,cuv,p;
char s[256],buffer[256];
FILE *f,*g;

int main()
{
	f=fopen("text.in","r");
	g=fopen("text.out","w");
	fgets(buffer,sizeof(buffer),f);
	strcat(s,buffer);
	l=strlen(s);
	i=1;
	while (i<=l){	
		if (isalpha(&s[i])==0)
			s[i]=' ';
		i++;
	}
	i=1;
	cuv=0;
	while (i<=l){
		while ((s[i]=' ')&&(i!=l)){
			i++;
			p=i;
		}
		if (s[i]!=' ')
		while ((s[i]!=' ')&&(i<=l)){
			i++;
		}
		if (i>p) cuv++;
	}
	k=(int)l/cuv;	
	fprintf(g,"%d",k);
return(0);
}