Problem:
Score : 300 points

Problem Statement

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.

Sample Input 1

?tc????
coder

Sample Output 1

atcoder

There are 26 strings that satisfy Condition 1: atcoder, btcoder, ctcoder,..., ztcoder.
Among them, the lexicographically smallest is atcoder, so we can say S = atcoder.

Sample Input 2

??p??d??
abc

Sample Output 2

UNRESTORABLE

There is no string that satisfies Condition 1, so the string S does not exist.

Solution in PHP (7.4.4) (judge verdict: Wrong Answer)

<?php
  //?の部分は全部aいれればいい
  //tの大きさが連続する?より小さい場合は?、tの末尾を?の末尾と合わせ、aで埋める
  //tの方が大きい場合は、?に末尾から入る分だけ入れて、tがsの中にあるか判別
fscanf(STDIN,"%s",$s);
fscanf(STDIN,"%s",$t);
$s_len = strlen($s);
$t_len = strlen($t);
$count = 0;
$res_start = 0;
for($i=0;$i<=$s_len-$t_len;$i++){
  for($j=$i;$j<$i+$t_len;$j++){
    //echo $s[$j]." ".$t[$j-$i]."\n";
    if($s[$j]==$t[$j-$i] || $s[$j]=='?'){
      $count++;
    }
  }
  if($count == $t_len){
    $res_start = $i;
  }
  //echo "-----------\n";
  $count = 0;
}


for($i=$res_start;$i<$res_start+$t_len;$i++){
  $s[$i] = $t[$i-$res_start];
}
  
for($i=0;$i<$s_len;$i++){
  if($s[$i]=='?'){
    $s[$i] = 'a';
  }
}
//echo $res_start;

echo $s."\n";