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.*;

class Main{
    public static void main(String[]args){
		Scanner sc = new Scanner(System.in);
		String line1 = sc.nextLine();
		String line2 = sc.nextLine();
		int ixlen = line1.length()-line2.length()+1;
		int reti = -1;
		int kouhoi = -1;
		for(int i=0; i<ixlen ;i++){
			if(line1.charAt(i) == '?' || line1.charAt(i) == line2.charAt(0)){
				kouhoi = i;
				for(int j=i+1,k=1;k<line2.length();j++,k++){
					if(line1.charAt(j) != '?' && line1.charAt(j) != line2.charAt(k)){
						kouhoi = -1;
						break;
					}
				}
				if(kouhoi!=-1){
					reti = kouhoi;
				}
			}
		}
		if(reti == -1){
			line1 = "UNRESTORABLE";
		}
		else{
			StringBuilder sb = new StringBuilder();
			for(int i=0;i<reti;i++){
				if(line1.charAt(i)=='?'){
					sb.append('a');
					continue;
				}
				sb.append(line1.charAt(i));
			}
			sb.append(line2);
			for(int j=sb.length();j<line1.length();j++){
				if(line1.charAt(j)=='?'){
					sb.append('a');
					continue;
				}
				sb.append(line1.charAt(j));
			}
			line1 = sb.toString();
		}
        System.out.println(line1);
    }
}
