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

见题面

见题面