ASME to SAME: Hacker Earth Algorithms December Contest
You are given 2 strings and � both containing only lowercase English characters with s containing some ? as well. You can swap characters at positions � and � in the string � ( � > � ) any number of times and can also replace any ? with any lowercase English character. Can you convert � into � ? Input Format The first line contains an integer � denoting the number of test cases. The first line of each test case contains an integer � , the length of the strings. The second line of each test case contains � lowercase English characters with some ? (possibly 0 ) denoting string � . The third line of each test case contains � lowercase English characters denoting string � . Output Format For each test case, print ' � � � ' (without quotation marks) if it is possible to convert � int...