I have no way of testing this but try this: ``` sub_arr = (a: @array, b: @array) { let result = [] // Checks if the lists are the same length if a.len() == b.len() { for i in 0 .. a.len() - 1 { let sub_result = [] for j in 0 .. 1 { let x = a[ij] - b[ij] sub_result.push(x) }, result.push(sub_result) }, }, else { $.print("Arrays are not the same length") return null }, return result }, // Test let array1 = [[0, 0], [2, 3], [2, 3]] let array2 = [[2, 3], [1, 2], [3, 2]] $.print(sub_arr(array1, array2)) ```
you know spwn?