def run() -> int32:
arr = [1, 2]
output(arr[0] + arr[1])
arr2 = [[1, 2, 3], [4, 5, 6], [7, 8, 9]]
arr2[output(1)][0] = 3
arr3 = [arr, arr2[0], arr2[1], arr2[2]]
output(arr3[0][0] + arr2[1][0] + arr2[2][0])
return 0