#include<iostream>
#include<cstdio>
#include<algorithm>
#include<cstring>
using namespace std;
char mi[28];
string jiami;
string yuan;
string fanyi;
int sum;
int a[27],b[27];
int main()
{
	freopen("spy.in","r",stdin);
	freopen("spy.out","w",stdout);
	memset(mi,'0',sizeof(mi));
	cin>>jiami>>yuan>>fanyi;
	int len1=jiami.size();
	int len2=fanyi.size();
	for(int i=0;i<len1;i++)
	{
		if(!a[jiami[i]-'A']&&!b[yuan[i]-'A'])
		{
			mi[jiami[i]-'A']=yuan[i];
			a[jiami[i]-'A']=b[yuan[i]-'A']=1;
			sum++;
		}
		else if(mi[jiami[i]-'A']!=yuan[i])
		{
			puts("Failed");
			return 0;
		}
		
	}
	if(sum!=26)
	{
		puts("Failed");
		return 0;
	}
	for(int i=0;i<len2;i++)
	{
		cout<<mi[fanyi[i]-'A'];
	}
	return 0;
}