CF1481C Fence Painting

You finally woke up after this crazy dream and decided to walk around to clear your head. Outside you saw your house's fence — so plain and boring, that you'd like to repaint it. You have a fence consisting of $ n $ planks, where the $ i $ -th plank has the color $ a_i $ . You want to repaint the fence in such a way that the $ i $ -th plank has the color $ b_i $ . You've invited $ m $ painters for this purpose. The $ j $ -th painter will arrive at the moment $ j $ and will recolor exactly one plank to color $ c_j $ . For each painter you can choose which plank to recolor, but you can't turn them down, i. e. each painter has to color exactly one plank. Can you get the coloring $ b $ you want? If it's possible, print for each painter which plank he must paint.

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