#include <cstdio>
#include <cstring>
int cuvinte,litere;
bool cuvant;
char c;

FILE * in = fopen("text.in","rt");
FILE * out = fopen("text.out","wt");

int main()
{
	while(!feof(in))
	{
		fscanf(in,"%c",&c);
		
		if( ('a' <= c && c <= 'z') || ('A' <= c && c <= 'Z') )
		{
			cuvant = true;
			litere++;
		}
		else
		{
			if(cuvant == true)
				cuvinte++;
			cuvant = false;
		}
	}
	
// 	printf("Sunt %d cuvinte in text.\n",cuvinte);
// 	printf("Sunt %d litere in text.\n",litere);
	
	fprintf(out,"%d",litere/cuvinte);
	
	return (0);
}