#include<iostream>
#include<cstdio>
#include<cstring>
using namespace std;
char pa[200],nw[200],ans[200];
char to[30];
int main(){
	freopen("spy.in","r",stdin);
	freopen("spy.out","w",stdout);
	scanf("%s",pa);
	scanf("%s",nw);
	scanf("%s",ans);
	for(int i=0;pa[i];i++){
		char a=pa[i],b=nw[i];
		if(to[a-'A']&&to[a-'A']!=b){
			printf("Failed");
			return 0;
		}
		to[a-'A']=b;
	}
	for(int i=0;i<26;i++)
		if(!to[i]){
			printf("Failed");
			return 0;
		}
	for(int i=0;i<26;i++)
		for(int j=i+1;j<26;j++)
			if(to[i]==to[j]){
				printf("Failed");
				return 0;
			}
	for(int i=0;i<strlen(ans);i++)
		printf("%c",to[ans[i]-'A']);
	return 0;
}