> RT，求括号括起来那句的意思....
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> For each test case, print one line of the form n = a + b, where a and b are odd primes. Numbers and operators should be separated by exactly one blank like in the sample output below. If there is more than one pair of odd primes adding up to n, 【choose the pair where the difference b - a is maximized】. If there is no such pair, print a line saying "Goldbach's conjecture is wrong." 
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