T = int(input()) ans = [] for _ in range(T): x, y = list(map(int, input().split())) y_max = y while True: x_bin = format(x, 'b')[::-1] if y_max > len(x_bin)-1 or x_bin[y_max] == "0": break y_max += 1 ans.append(2**y_max - 1) print(*ans, sep="\n")