#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,ok=0;
	char c[500];
	fgets(c,500,stdin);
	int l=strlen(c)-1;
	for(int i=1;i<=l;++i){
		if(isalpha(c[i])){
			++nrl;
			ok=0;
		}
		else ++ok;
		if(ok==1 && nrl!=0)++nrc;
	}
	
	printf("%d",nrl/nrc);
	
	return 0;
	
}