The objective is to draw a spiral pattern, starting from the centre, and wrapping around itself in a counter-clockwise direction. Each step is numbered by an integer, starting at 0 and counting up. There are no spaces joining the numbers, but some spots might be filled by a period (.) to complete a minimum rectangle, *assuming that each number takes up just one slot*.

The input file **DATA4.txt** will contain 5 lines, integers 0 ≤ `N` ≤ 20, the highest number appearing in the pattern.

The output file **OUT4.txt** will contain 5 sets – rendered patterns as described above.

Sample Input:

```
0
1
2
4
12
```

Sample Output:

```
0
0
1
0.
12
.4
03
12
654.
703.
812.
9101112
```