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.*;
public class Main {
	public static void main(String args[]) {
		Scanner sc = new Scanner(System.in);
		String S = sc.nextLine();
		String T = sc.nextLine();
		String str = "";
		outside : for(int i = 0; i <= S.length() - T.length(); i++) {
			StringBuilder sb = new StringBuilder(S);
			sb = sb.replace(i, i + T.length(), T);
			//System.out.println(sb);
			for(int j = 0; j < S.length(); j++) {
				if(!sb.substring(j, j + 1).equals("?")) {
					if(j >= i && j <= i + T.length()) {
						if(!S.substring(j, j + 1).equals("?")) {
							if(!sb.substring(j, j + 1).equals(S.substring(j, j + 1))) {
								continue outside;
							}
						}
						//System.out.println(sb.substring(j, j + 1)+":"+sb);
					}else if(S.substring(j, j + 1).equals(sb.substring(j, j + 1))) {
						//System.out.println(sb.substring(j, j + 1)+":"+sb);
					} else {
						//System.out.println(sb.substring(j, j + 1)+":"+"No");
						continue outside;
					}
				} else {
					sb.replace(j, j + 1, "a");
					//System.out.println(sb.substring(j, j + 1)+":"+sb);
				}
			}
			str = sb.toString();
		}
		if(str == "") {
			System.out.println("UNRESTORABLE");
		} else {
			System.out.println(str);
		}
	}
}
