Diamond#1340
Draw a diamond shape using the character '*'.
The input consists of several lines. Each line contains a single non-negative integer (N \leq 100). A line with N = 0 indicates the end of the input.
For each input case, draw a diamond of width as shown in the sample. Make sure there are no unnecessary spaces after any '*' character on a line.
Different test cases should be separated by a blank line.
Example 1