#include<iostream>
#include<string>
using namespace std;
int main(void)
{
	while(1)
	{
		char firstStr[501];
		char secondStr[501];
		cin>>firstStr;
		if(!strcmp(firstStr,"-1"))
			return 0;
		cin>>secondStr;
		int len1=strlen(firstStr);
		int len2=strlen(secondStr);
		if(strcmp(firstStr,secondStr)==0)
		{
			cout<<"appx("<<firstStr<<","<<secondStr<<") = "<<1<<endl;
			continue;
		}
		int sum=0;
		if(len1>len2)
		{
			for(int i=0;i<len1;i++)
			{
				int tmpsum=0;
				int tmp_i=i;
				for(int j=0;j<len2&&tmp_i<len1;j++,tmp_i++)
				{
					if(firstStr[tmp_i]==secondStr[j])
						tmpsum++;
				}
				if(tmpsum>sum)
					sum=tmpsum;
			}
		}
		else
		{
			for(int i=0;i<len2;i++)
			{
				int tmpsum=0;
				int tmp_i=i;
				for(int j=0;j<len1&&tmp_i<len2;j++,tmp_i++)
				{
					if(firstStr[j]==secondStr[tmp_i])
						tmpsum++;
				}
				if(tmpsum>sum)
					sum=tmpsum;
			}
		}
		int len=len1+len2;
		sum*=2;
		if(sum==0)
		{
			cout<<"appx("<<firstStr<<","<<secondStr<<") = "<<0<<endl;
			continue;
		}
		for(int i=2;i<=sum&&sum<=len;)
		{
			if(len%i==0&&sum%i==0)
			{
				len/=i;
				sum/=i;
			}
			else 
				i++;
		}
		cout<<"appx("<<firstStr<<","<<secondStr<<") = "<<sum<<"/"<<len<<endl;
	}
	return 0;
}