#include<cstdio>
#include<cstring>
#include<cctype>
using namespace std;
int main(){
	freopen("text.in","r",stdin);
	freopen("text.out","w",stdout);
	int nrc=0,nrl=0;
	char c[500];
	fgets(c,500,stdin);
	int l=strlen(c)-1,i=1;
	for(int i=1;i<=l;++i){
		if(isalpha(c[i]))++nrl;
		if(c[i]==' ' || c[i]=='-')++nrc;
	}
	
	printf("%d",nrl/nrc);
	
	return 0;
	
}