#include<stdio.h>
int l,c,k;
char s;
int main()
{
	freopen("text.in","r",stdin),freopen("text.out","w",stdout);
	while(scanf("%c",&s)!=EOF)
        if((s>='a'&&s<='z')||(s>='A'&&s<='Z')) {
            if(!k)
                ++c;
            ++l,k=1;
        } else
            k=0;
	printf("%d",l/c);
	return 0;
}