class Solution:
    def shuffle(self, nums, n):
        shuffled = []
        for a in range(n):
            shuffled.append(nums[a])
            shuffled.append(nums[a + n])
        return shuffled

s = Solution()
print("Expected: [2, 3, 5, 4, 1, 7]")
print("Got:", s.shuffle([2, 5, 1, 3, 4, 7], 3))