A8865. Dividing Orange

One day Ms Swan bought an orange in a shop. The orange consisted of $n·k$ segments, numbered with integers from 1 to $n·k$ .

There were $k$ children waiting for Ms Swan at home. The children have recently learned about the orange and they decided to divide it between them. For that each child took a piece of paper and wrote the number of the segment that he would like to get: the $i$ -th $(1<=i<=k)$ child wrote the number $a_{i}$ $(1<=a_{i}<=n·k)$ . All numbers $a_{i}$ accidentally turned out to be different.

Now the children wonder, how to divide the orange so as to meet these conditions:

- each child gets exactly $n$ orange segments;
- the $i$ -th child gets the segment with number $a_{i}$ for sure;
- no segment goes to two children simultaneously.

Help the children, divide the orange and fulfill the requirements, described above.

The first line contains two integers $n$ , $k$ $(1<=n,k<=30)$ . The second line contains $k$ space-separated integers $a_{1},a_{2},...,a_{k}$ $(1<=a_{i}<=n·k)$ , where $a_{i}$ is the number of the orange segment that the $i$ -th child would like to get.

It is guaranteed that all numbers $a_{i}$ are distinct.

Print exactly $n·k$ distinct integers. The first $n$ integers represent the indexes of the segments the first child will get, the second $n$ integers represent the indexes of the segments the second child will get, and so on. Separate the printed numbers with whitespaces.

You can print a child's segment indexes in any order. It is guaranteed that the answer always exists. If there are multiple correct answers, print any of them.