#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,t=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;
		else ++ok;
		if(ok==1 && nrl!=0){
			++nrc;
			t+=nrl;
			nrl=0;
		}
	}
	
	printf("%d",nrl/nrc);
	
	return 0;
	
}