#define _CRT_SECURE_NO_WARNINGS
#include "stdio.h"
int main()
{
		unsigned int len,nr,last;
		unsigned char c;
		len = nr = last = 0;
		FILE *f,*g;
		f = fopen("text.in","r");
		g = fopen("text.out","w");
		last = 0;
		while(fscanf(f,"%c",&c)!=-1)
		{
			if(((c>='a')&&(c<='z'))||((c>='A')&&(c<='Z')))
			{
				len ++;
				last =1;
			}
			else
			{
				if(last)
				{
					last = 0;
					nr++;
				}
			}
		}
		if(last)
			nr++;
		fprintf(g,"%d",len/nr);
		fclose(g);
		return 0;
}