#include<stdio.h>
FILE*A,*B;
char mes;
int cuv=0,lit=0;
int main()
{
	A=fopen("text.in","r");
	B=fopen("text.out","w");
	fscanf(A,"%c",&mes);
	while(!feof(A))
	{
		if(( (mes>='a'&&mes<='z') || (mes>='A'&&mes<='Z') ))
		{
			while( (mes>='a'&&mes<='z') || (mes>='A'&&mes<='Z') ){fscanf(A,"%c",&mes);lit++;}
			cuv++;
		}
		fscanf(A,"%c",&mes);
	}
	fprintf(B,"%d",lit/cuv);
	fclose(A);fclose(B);
}