E869120 found a chest which is likely to contain treasure.
However, the chest is locked. In order to open it, he needs to enter a string S consisting of lowercase English letters.
He also found a string S', which turns out to be the string S with some of its letters (possibly all or none) replaced with `?`.

One more thing he found is a sheet of paper with the following facts written on it:

* Condition 1: The string S contains a string T as a contiguous substring.
* Condition 2: S is the lexicographically smallest string among the ones that satisfy Condition 1.



Print the string S.
If such a string does not exist, print `UNRESTORABLE`.

Constraints

* 1 \leq |S'|, |T| \leq 50
* S' consists of lowercase English letters and `?`.
* T consists of lowercase English letters.

Input

Input is given from Standard Input in the following format:


S
T'


Output

Print the string S.
If such a string does not exist, print `UNRESTORABLE` instead.

Examples

Input

?tc????
coder


Output

atcoder


Input

??p??d??
abc


Output

UNRESTORABLE
import java.util.*;
import java.util.function.*;
import java.math.*;
public class Main {
    public static void main(String[] args){
		Scanner s = new Scanner(System.in);
		String S = s.next();
		String T = s.next();
		char[] t = T.toCharArray();
		
		String question = "";
		for(int i = 0; i < T.length(); i++) {
			question += "?";
		}
		if(S.lastIndexOf(question) > -1) {
			String rest = S.substring(0, S.lastIndexOf(question));
			System.out.println(rest.replaceAll("\\?", "a") + T);
			return;
		}
		
		String cur;
		for(int i = S.length() - T.length(); i > -1; i--) {
			cur = S.substring(i, i + T.length());
			for(int j = T.length() - 1; j > -1; j--) {
				if(cur.charAt(j) == t[j] || cur.charAt(j) == '?') {
					if(j == 0) {
						String front = S.substring(0, i).replaceAll("\\?", "a");
						String back = S.substring(i + T.length()).replaceAll("\\?", "a");
						System.out.println(front + T + back);
						return;
					}
				}else {
					break;
				}
			}
		}
		System.out.println("UNRESTORABLE");
    }
}