Given n (at most 9), return the mirror image of the Increasing Number Triangle: n right-aligned rows where row i shows the digits from i down to 1. A mirror imageMirror ImageThe shape flipped left-to-right: what was on the left is now on the right, and sequences read in reverse. flips two things at once — the row moves to the right edge (leading spaces) and its contents read backwards. Because the total width is always n, the rows line up on the right.