// kombinacio.cpp : This file contains the 'main' function. Program execution begins and ends there.
//

#include <iostream>
#include <vector>
#define ll long long
using namespace std;

ll n, m, i, akt;

int main()
{
    cin >> n >> m;

    vector<ll>x(m + 1), elozo(m + 1), utana(m + 1);

    for (i = 1; i <= m; ++i)
    {
        cin >> x[i];
        elozo[i] = x[i];
        utana[i] = x[i];
    }

    for (i = m; i >= 1; --i)
    {
        if (i == 1)
        {
            if (elozo[i] > 1)
            {
                --elozo[i];
                break;
            }
        }
        else
        {
            if (elozo[i] - 1 > elozo[i - 1])
            {
                --elozo[i];
                break;
            }
        }
    }

    for (i = m; i >= 1; --i)
    {
        if (i == m)
        {
            if (utana[i] + 1 <= n)
            {
                ++utana[i];
                break;
            }
        }
        else
        {
            if (utana[i] + 1 < utana[i + 1])
            {
                ++utana[i];
                break;
            }
        }
    }

    for (i = 1; i <= m; ++i)
    {
        cout << elozo[i] << " ";
    }
    cout << "\n";
    for (i = 1; i <= m; ++i)
    {
        cout << utana[i] << " ";
    }
    return 0;
}

/*
6 4
1 2 4 6
*/
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