Given `a`, `b`, `c` and `k`. Find the `kth` smallest positive number which is divisible by `a` or `b` or `c`.\n\n**Example 1:**\n```\nInput: a = 1, b = 2, c = 3, k = 4\nOutput: 4\nExplanation:\nSequence is 1, 2, 3, 4, 5...\n```\n\n**Example 2:**\n```\nInput: a = 2, b = 4, c = 5, k = 5\nOutput: 8\nExplanation:\nSequence is 2, 4, 5, 6, 8, 10...\n```\n\n**Example 3:**\n```\nInput: a = 2, b = 3, c = 5, k = 10\nOutput: 14\nExplanation:\nSequence is 2, 3, 4, 5, 6, 8, 9, 10, 12, 14, 15, 16...\n```\n\n**Example 4:**\n```\nInput: a = 3, b = 5, c = 7, k = 10\nOutput: 18\n```\n\nConstraints:\n* 1<= `T` <=10^5\n* 1<= `a`, `b`, `c` <=10^4\n* 1<= `k` <=10^12\n\nTime limit: 2 sec

Given a, b, c and k. Find the kth smallest positive number which is divisible by a or b or c.\n\nExample 1:\n\nInput: a = 1, b = 2, c = 3, k = 4\nOutput: 4\nExp