Canadian Computing Competition: 2001 Stage 1, Junior #4, Senior #2

A spiral of numbers can start and end with any positive integers less than \(100\) . Write a program which will accept two positive integers \(x\) and \(y\) as input, and output a list of numbers from \(x\) to \(y\) inclusive, shown in a spiral. You may assume that the end value is greater than or equal to the start value.

A spiral starts with the first number in the centre. The next number appears immediately below the first number. The spiral continues with the numbers increasing in a counter-clockwise direction until the last number is printed.

Sample Input 1

10
27

Sample Output 1

      27 26
16 15 14 25
17 10 13 24
18 11 12 23
19 20 21 22

Sample Input 2

7
12

Sample Output 2

12 11
 7 10
 8  9