+---+---+---+---+---+ | 0 | 4 | 4 | 0 | 0 | -> +---+---+---+---+---+ | 2 | 2 | 3 | 0 | 0 | +---+---+---+---+---+ | 1 | 1 | 3 | 0 | 0 | +---+---+---+---+---+