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

int main ()
{
	char c;
	int cuv=0,lungime=0,lit=0;
	FILE *in,*out;
	in=fopen("text.in","r");	
	out=fopen("text.out","w");
	
	while(!feof(in))
	{	
		fscanf(in,"%c",&c);
		if(isalpha(c))
		{
			lungime++;
			if(!lit)
			{
				cuv++;
				lit=1;
			}
		}
		else
			lit=0;	
	}
	fprintf(out,"%d",lungime/cuv);	
	return 0;
}