Number Steps

Time Limit: 2 Seconds    Memory Limit: 32768 KB

Starting from point (0,0) on a plane, we have written all non-negative integers 0,1,2, … as shown in the figure. For example, 1, 2, and 3 has been written at points (1,1), (2,0), and (3, 1) respectively and this pattern has continued.

You are to write a program that reads the coordinates of a point (x, y), and writes the number (if any) that has been written at that point. (x, y) coordinates in the input are in the range 0…5000.

Input

The first line of the input file contains a single integer t (1 <= t <= 100), the number of test cases. In each of the t following lines, there is x, and y representing the coordinates (x, y) of a point.

Output

For each point in the input, write the number written at that point or write ‘No Number’ if there is none.

Sample Input

3
4 2
3 4
6 6

Sample Output

6
No Number
12

Submit

Source: 12th Iran Nationwide Internet Contest I