Mosaic Panel Reflow

A mosaic restoration studio stores every panel as a rectangular grid of tile IDs. A client requests that a panel be reflowed into a grid with a different number of rows and columns, without disturbing the reading order of the tiles: read the current panel row by row, left to right and top to bottom, then lay those tiles back down in that exact order into the new grid, again filling it row by row, left to right and top to bottom. If the requested grid does not have exactly the same total number of tiles as the original panel, the reflow cannot be carried out and the panel must be handed back exactly as it started. Given the original panel and the requested dimensions, output the resulting grid.

Input format

• Line 1: two integers m and n, the number of rows and columns of the original panel.
• Next m lines: each contains n space-separated integers, the tile IDs of that row.
• Last line: two integers r and c, the requested number of rows and columns.

Output format

If r * c equals m * n, print the reflowed panel as r lines of c space-separated integers. Otherwise, print the original panel unchanged, as m lines of n space-separated integers.

Constraints

• 1 <= m, n <= 100
• 1 <= r, c <= 100
• -1000 <= tile ID <= 1000

2 2
1 2
3 4
1 4

1 2 3 4

2 2
1 2
2 4
2 4

1 2
2 4