#include "map"
#include "iostream"
#include "algorithm"
#include "cstring"
#include "string"
#define N 100
using namespace std;
map<string,int> set;
map<string,int>::iterator iter;
int main()
{
	char c,now[N];
	int i=0,a=0,b=0,m;
	while((c=getchar())!=EOF){
		if(c>='a'&&c<='z'||c>='A'&&c<='Z')
			now[i++]=c;
		else if(i>0){
			now[i]='\0';
			if(strcmp(now,"BULLSHIT")==0){
				b++;a+=set.size();
				set.clear();
			}
			else
				set[now]++;
			i=0;
		}
	}
	m=a>b?b:a;
	for(i=m;i>1;i--)
		if(a%i==0&&b%i==0){
			a/=i;b/=i;
			break;
		}
	printf("%d / %d\n",a,b);
	return 0;
}

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