#include<stdio.h>
#include<string.h>
FILE*f=fopen("text.in","r");
FILE*g=fopen("text.out","w");
int x,litere,cuvinte,s,c,i,ok;
char v[5000];
int main () {
	while(fscanf(f,"%c",&v[++c])!=EOF)
		ok=0;
	for(i=1;i<=c;i++){
		if(('A'<=v[i]&&'Z'>=v[i])||('a'<=v[i]&&'z'>=v[i])){
			litere++;
			ok=1;
		}
		else{			
			if(ok==1){
				cuvinte++;
				ok=0;
			}
		}
	}
	fprintf(g,"%d",litere/cuvinte);
	
	fclose(f);
	fclose(g);
	return 0;
}