#include<bits/stdc++.h>
using namespace std;
int inline cc(){
	freopen("spy.in","r",stdin);
	freopen("spy.out","w",stdout);
	bool b[26]={0};
	char a[26]={0};
	int i,s=0;
	string s1,s2;
	cin>>s1>>s2;
	for(i=0;i<s1.size();i++)
	{
		if(a[int(s1[i])-65]==0&&!b[int(s2[i])-65])
		{
			a[int(s1[i])-65]=s2[i];
			s++;
			b[int(s2[i])-65]=1;
		}
		if(a[int(s1[i])-65]!=0&&a[int(s1[i])-65]!=s2[i]||a[int(s1[i])-65]==0&&b[int(s2[i])-65])
		{
			cout<<"Failed";
			return 0;
		}
	}
	cin>>s1;
	for(i=0;i<s1.size();i++)
		if(!a[int(s1[i])-65]||s<26)
		{
			cout<<"Failed";
			return 0;
		}
	for(i=0;i<s1.size();i++)
		cout<<a[int(s1[i])-65];
}
int aa=cc();
int main(){;
}