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A. Dividing Orange

time limit per test

2 secondsmemory limit per test

256 megabytesinput

standard inputoutput

standard outputOne 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.

Input

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.

Output

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.

Examples

Input

2 2

4 1

Output

2 4

1 3

Input

3 1

2

Output

3 2 1

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