A. Ian Visits Marytime limit per test1 secondmemory limit per test256 megabytesinputstandard inputoutputstandard outputIan and Mary are frogs living on lattice points of the Cartesian coordinate plane, with Ian living on (0,0) and Mary living on (a,b). Ian would like to visit Mary by jumping around the Cartesian coordinate plane. Every second, he jumps from his current position (x_p, y_p) to another lattice point (x_q, y_q), such that no lattice point other than (x_p, y_p) and (x_q, y_q) lies on the segment between point (x_p, y_p) and point (x_q, y_q). As Ian wants to meet Mary as soon as possible, he wants to jump towards point (a,b) using at most 2 jumps. Unfortunately, Ian is not good at maths. Can you help him?A lattice point is defined as a point with both the x-coordinate and y-coordinate being integers.InputThe first line contains a single integer t (1 \le t \le 500) — the number of test cases. The description of test cases follows.The first and only line of each test case contains two integers a and b (1\le a,b\le 10^9) — the coordinates of the lattice point where Mary lives.OutputFor each test case, print an integer n (1 \le n \le 2) on the first line, denoting the number of jumps Ian uses in order to meet Mary. Note that you do not need to minimize the number of jumps.On the i-th line of the next n lines, print two integers 0 \le x_i,y_i \le 10^9 separated by a space, denoting Ian's location (x_i,y_i) after the i-th jump. x_n = a, y_n = b must hold.Ian's initial location and his locations after each of the n jumps need not be distinct.If there are multiple solutions, output any.ExampleInput
83 44 43 62 21 17 32022 20231000000000 1000000000Output
1
3 4
2
3 2
4 4
2
5 3
3 6
2
1 0
2 2
1
1 1
1
7 3
1
2022 2023
2
69420420 469696969
1000000000 1000000000
NoteIn the first test case:(0,0) \to (3,4)In the second test case:(0,0) \to (3,2) \to (4,4)In the third test case:(0,0) \to (5,3) \to (3,6)
83 44 43 62 21 17 32022 20231000000000 1000000000
1 3 4 2 3 2 4 4 2 5 3 3 6 2 1 0 2 2 1 1 1 1 7 3 1 2022 2023 2 69420420 469696969 1000000000 1000000000 
['constructive algorithms', 'geometry', 'number theory', '*800']