#include<stdio.h>
#include<string.h>

int isletter(char c)
{   return((c>='a'&&c<='z')||(c>='A'&&c<='Z'));
}

int main()
{
    int count=0;
    int len=0;
    char a,b;

    freopen("text.in","r",stdin);
    while(scanf("%c", &a)!=EOF)
    {
	if(isletter(a))
	{   len++;
	    if(!isletter(b)) count++;
	}
	b=a;
    }
    freopen("text.out","w",stdout);
    printf("%d\n",len/count);
    return 0;
}