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All You Need Is Love
“All you need is love. All you need is love. There was invented a new powerful gadget by the International Beautiful Machines corporation called the love machine! Given a string made of binary digits, the love machine answers if it's made only of love, that is, if all you need is love to build that string. The definition of love for the love machine is another string of binary digits, given by a human operator. Let's say we have a string L which represents “love” and we give a string S for the love machine. We say that all you need is love to build S, if we can repeatedly subtract L from S until we reach L. The subtraction defined here is the same arithmetic subtraction in base 2. By this definition, it's easy to see that if L > S (in binary), then S is not made of love. If S = L then S is obviously made of love. Let's see an example. Suppose S = 11011 and L = 11. If we repeatedly subtract L from S, we get: 11011, 11000, 10101, 10010, 1111, 1100, 1001, 110, 11. So, given this L, all you need is love to build S. Because of some limitations of the love machine, there can be no string with leading zeroes. That is, 0010101, 01110101, 011111, etc. are invalid strings. Strings which have only one digit are also invalid (it's another limitation). Your task in this problem is: given two valid binary strings, S1 and S2, find if it's possible to have a valid string L such that both S1 and S2 can be made only of L (i.e. given two valid strings S1 and S2, find if there exists at least one valid string L such that both S1 and S2 are made only of L). For instance, for S1 = 11011 and S2 = 11000, we can have L = 11 such that S1 and S2 are both made only of L (as we can see in the example above). Input SpecificationThe first line of the input is a positive integer N < 10000 which stands for the number of test cases. Then 2N lines will follow. Each test case consists of a pair of lines. The two lines of the pair stand for the strings (S1 and S2) to be entered as input for the love machine. No strings will have more than 30 characters. You can assume that all strings in the input will be valid according to the rules above. Output SpecificationFor each string pair, you must print one of the following messages:
Pair #p: All you need is love!
where p stands for the pair number (starting from 1). You should print the first message if there exists at least one valid string L such that both S1 and S2 can be made only of L. Otherwise, print the second line. Sample Input
Output for Sample Input
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University of Debrecen; Faculty of Informatics; v. 03/01/2019 |