You are given two arrays of integers: (a_1, a_2, \ldots, a_n) and (b_1, b_2, \ldots, b_m). You need to determine if it is possible to transform array (a) into array (b) using the following operation several (possibly, zero) times. Among all non-empty subarrays(^{\text{∗}}) of (a), choose any with the maximum sum, and replace this subarray with an arbitrary non-empty integer array. If it is possible, you need to construct any possible sequence of operations. Constraint: in your answer, the sum of the lengths of the arrays used as replacements must not exceed (n + m) across all operations. The numbers must not exceed (10^9) in absolute value. (^{\text{∗}})An array (a) is a subarray of an array (b) if (a) can be obtained from (b) by the deletion of several (possibly, zero or all) elements from the beginning and several (possibly, zero or all) elements from the end. Each test contains multiple test cases. The first line contains the number of test cases (t) ((1 \le t \le 200)). The description of the test cases follows. The first line of each test case contains two integers (n, m) ((1 \le n, m \le 500)) — the lengths of arrays (a) and (b). The second line of each test case contains (n) integers (a_1, a_2, \ldots, a_n) ((-10^6 \le a_i \le 10^6)) — the elements of array (a). The third line of each test case contains (m) integers (b_1, b_2, \ldots, b_m) ((-10^6 \le b_i \le 10^6)) — the elements of array (b). It is guaranteed that the sum of the values of (n) across all test cases does not exceed (500). It is guaranteed that the sum of the values of (m) across all test cases does not exceed (500). For each test case, output (-1) if it is impossible to transform array (a) into array (b). Otherwise, in the first line, output the number of operations (0 \leq q \leq n + m). Then output the operations in the following format in the