C++ :

#include<iostream>
#include<algorithm>
using namespace std;
string s1,s2,s3;
int a[45];
int b[45];
int main()
{
	cin>>s1>>s2>>s3;
		int len1=s1.size();
		int len2=s2.size();
		for(int i=0;i<len1;i++)
		{
			b[s2[i]-'A'+1]=1;
			if(a[s1[i]-'A'+1]==0)
			{
				a[s1[i]-'A'+1]=s2[i]-'0';
			}
			else
			{
				if(a[s1[i]-'A'+1]==s2[i]-'0')
				continue;
				else
				{
					cout<<"Failed"<<endl;
					return 0;
				}
			}
		}
		for(int i=1;i<=26;i++)
		{
			if(b[i]==0)
			{
				cout<<"Failed"<<endl;
				return 0;
			}
		}
		for(int i=0;i<s3.size();i++)
		{
			cout<<char(a[s3[i]-'A'+1]+48);
		}
	return 0;
}