#include <cstdio>
#include <cstring>
#include <ctype.h>

using namespace std;

FILE *fp;
char words[512][30];
int nWords;
int nW;
int nBingo;

int findWord(char* w)
{
	for( int i=0; i<nWords; i++)
		if( strcmp(w, words[i])==0)
			return i;
	return -1;
}

int ggt(int a, int b)
{
	if(b==0) return a;
	else return ggt(b, a%b);
}

int main()
{
	fp = fopen("bingo.in","r");

	nWords=0;
	nW = 0;
	nBingo=0;
	int l=0;
	char w[30];
	strcpy(w, "\0");
	char c;
	while (fscanf(fp,"%c",&c)>0)
	{
		if(isalpha(c))
		{
			w[l++]=c;
			w[l]='\0';
		}
		else if (l>0)
		{
			if(strcmp(w, "BULLSHIT")==0)
			{
				nW+=nWords;
				nWords=0;
				nBingo++;
			}
			else
			{
				//printf("word: %s\n",w);
				if(findWord(w)<0)
					strcpy(words[nWords++],w);
			}
			strcpy(w, "\0");
			l=0;
		}
	}


	int gg = ggt(nW,nBingo);
	nW /=gg;
	nBingo /= gg;
	printf("%d / %d\n",nW,nBingo);
	
	fclose(fp);
	return 0;
}