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 Kotlin (1.0.0) (judge verdict: Wrong Answer)

fun main(args: Array<String>) {
    var sResult = ""
    val sDash = readLine().orEmpty()
    val sLength = sDash.length
    val tStr = readLine().orEmpty()
    val tLength = tStr.length
    var foundId = 0
    var judge = "UNRESTORABLE"

    run loop@{
        for(i in 0 .. sLength - tLength){
            val sSub = sDash.substring(i ,i + tLength)
            var sJudge = ""
            sSub.forEach {
                if(it == '?'){
                    sJudge += "[a-z]"
                }else{
                    sJudge += it
                }
            }
            val sReg = Regex(sJudge)
            val tmp = sReg.matchEntire(tStr)

            if(tmp != null){
                foundId = i
                judge = ""
                return@loop
            }

        }
    }

    if(judge == "UNRESTORABLE"){
        println(judge)
    }else{
        val sRepl = sDash.substring(foundId, foundId + tLength)
        sResult = sDash.replace(sRepl,tStr)
        sResult = sResult.replace("?","a")
        println(sResult)
    }



}