#include<fstream.h>
#include<stdio.h>
int main()
{
	char c='a';
	int x=0,nr=0;
	FILE *f=fopen("text.in","r");
	ofstream fcout("text.out");
	while(c!="/n"){
		fscanf(f,"%c",c);
		if(c<='z'&&c>="A")nr++;
		else x++;}
	fcout<<nr/x;
	return 0;
}