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.Scanner;

public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);

        char[] s = sc.next().toCharArray();
        char[] t = sc.next().toCharArray();

        boolean flag = false;
        int i = s.length - t.length;
        for(i = s.length - t.length; i >= 0; i--) {
            flag = true;
            for(int j = 0; j < t.length; j++) {
                if(!(s[i + j] == '?' || s[i + j] == t[j])) {
                    flag = false;
                    break;
                }
            }
            if(flag) break;
        }

        if(flag) {
            for(int j = 0; j < s.length; j++) {
                if(s[j] == '?') {
                    if(i <= j && j < i + t.length) s[j] = t[j - i];
                    else s[j] = 'a';
                }
            }
            System.out.println(String.valueOf(s));
        }else {
            System.out.println("UNRESTORABLE");
        }

        sc.close();
    }
}