Relax! It's Just a Game

• You: What's the score? Did I miss much?
• Me: It's 2-1 for elAhli and the second half just started. The first half was quite boring.
• You: Who scored first, elAhli or ezZamalek?
• Me: What difference does it make?
• You: A big difference! I can predict the outcome of the match if I know the order in which the goals were scored in the first half.
• Me: What do you mean?
• You: It's 2-1 for elAhli, right? One of three things could have happened: elAhli scored twice and then ezZamalek scored; or elAhli scored, then ezZamalek, then elAhli again; or ezZamalek scored first and then elAhli scored twice.
• Me: So?!! I still don't see what difference it makes. It's still 2-1 for elAhli! Why don't you relax and let us watch the game in peace?
• You: You don't understand! I believe the probability of who will win depends on the order in which the goals were scored. Now I have to analyze 3 possibilities.
• Me: And what if the score were 3-2? What would you do then?
• You: I would have to work through 5 different possibilities. Right?
• Me: Of course not! The number of possibilities isn't always equal to the sum.
• You: Can you tell me when it is equal to the sum?
• Me: You're a programmer. Why don't you write a program that counts the number of possibilities and compares it to the sum?
• You: I don't have time; I want to watch the match. Besides, I have nine other problems to worry about.
• Me: I'll give you a hint. The number of possibilities equals the sum only when one of the teams scored a certain number of goals.

Given a first-half score, the number of possibilities is the number of distinct orders in which the goals could have been scored: if one team scored $A$ goals and the other scored $B$ goals, it equals $\binom{A+B}{A}$. For each score, decide whether this number of possibilities equals the sum $A+B$.

The input consists of one or more test cases. Each test case is a single line with two natural numbers $A$ and $B$ (separated by one or more spaces) giving the first-half score. No team scores more than $10$ goals, so $0 \le A, B \le 10$. Input ends with a line containing two values of $-1$, which is not part of the test cases.

For each test case, if the number of possibilities equals the sum, print:

A+B=C

where $A$ and $B$ are the two scores and $C$ is their sum. If the number of possibilities is not equal to the sum, replace the = sign with !=.