405048: GYM101755 A Restoring Numbers
Memory Limit：256 MB
Time Limit：2 S
Judge Style：Text Compare
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Submit：0
Solved：0
Description
A. Restoring Numberstime limit per test2 secondsmemory limit per test256 megabytesinputstandard inputoutputstandard output
Pavel had two positive integers a and b. He found their sum s and greatest common divisor g, and forgot a and b after that. Help him to restore the original numbers.
InputA single line contains two integers s and g (1 ≤ s ≤ 109, 1 ≤ g ≤ 109) — sum and greatest common divisor of the numbers a and b.
OutputIf Pavel made a mistake and there are no such numbers a and b, output a single number - 1.
Otherwise, output two positive integers a and b on a single line, separated by a space. If there are multiple possible solutions, output any of them.
ExamplesInput6 2Output
4 2Input
7 2Output
-1