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Jul 28, 2015 at 19:19 comment added ASBO Allstar You're quite correct, my last needs some tidying up to remove duplicates
Jul 28, 2015 at 19:10 comment added Michael E2 Your result contains both {a, b} and {b, a} -- for example, {1, 27} and {27, 1}. Is that what you want? (My answer contains only one of the pairs, but the others are easily added.)
Jul 28, 2015 at 17:52 history edited ASBO Allstar CC BY-SA 3.0
added 6 characters in body
Jul 28, 2015 at 17:46 history edited ASBO Allstar CC BY-SA 3.0
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Jul 28, 2015 at 17:39 history answered ASBO Allstar CC BY-SA 3.0