#include<stdio.h>
FILE*f=fopen("text.in","r");
FILE*g=fopen("text.out","w");
int x,ok,litere,cuvinte;
int main () {
	while(fscanf(f,"%c",&x)!=EOF){
		fscanf(f,"%c",&x);
		if(('A'<=x&&'Z'>=x)||('a'<=x&&'z'>=x)){
			ok=1;
			litere++;
		}
		else{
			if(ok==0)
				cuvinte++;
		}
		ok=0;
	}
	
	fprintf(g,"%d",litere/cuvinte);
	
	fclose(f);
	fclose(g);
	return 0;
}