#include <stdio.h>

const int N=1<<10;

inline bool litera(char c)
{
    return (c>='a' && c<='z') || (c>='A' && c<='Z');
}
int main()
{
	char s[N];
	int i,nr=0,ss=0;
	freopen("text.in","r",stdin);
	freopen("text.out","w",stdout);
	gets(s);
	//if (litera(s[0])) nr++;
    for (i=0;s[i];++i)
	{
        if (litera(s[i]) && !litera(s[i+1]) )
            ++nr;
		if (litera(s[i])) ss++;
	}
	printf("%d",ss/nr);
	return 0;
}