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Simplified Goldbach conjecture: no more than 6 even number can be expressed as the sum of two prime numbers. Now from the keyboard to input a number from 0 to 65535 unsigned integer test certificate Goldbach conjecture. Input 12, output: 12 = 5+7 The input 20, output: 20 = 3+17 20, = 7+13 such as the number of input, output: Must be even such as input, output: Must be greater than or equal to 6