For each score $h_i$, print the final size of the multiset $s$, followed by $s$ integers describing the contents of the multiset in any order ($0 \le s \le k$). It must be possible to achieve the score $h_i$ with this multiset at the end of the game. If there are multiple answers, print any of them.

If it is impossible to have the score $h_i$ at the end of the game, print a single integer $-1$ instead.