#include <bits/stdc++.h>

using namespace std;

int a[1010][1010], d[1010][1010];

void write()
{
    cout << "Impossible\n";
}

int main()
{
    int x, y;
    cin >> x >> y;
    --y;
    for(int i = 0; i < x; ++i)
        cin >> a[i][0], --a[i][0];

    for(int i = 0; i < x; ++i)
        cin >> a[i][1], --a[i][1];

    /*sort(&a[0][0], &a[0][0] + x);
    sort(&a[1][0], &a[1][0] + x);*/

    for(int i = 0; i <= x; ++i)
    {
        int mx = 400;
        for(int j = 0; j < i; ++j)
            d[a[j][0]][0] = mx, --mx;

        mx = x - i;

        for(int j = i; j < x; ++j)
            d[a[j][0]][0] = mx, --mx;

        for(int j = 0; j <= x; ++j)
        {
            mx = 400;
            for(int k = 0; k < j; ++k)
                d[a[k][1]][1] = mx, -mx;

            mx = x - j;

            for(int k = j; k < x; ++k)
                d[a[k][1]][1] = mx, --mx;

            int p = 0;
            int w = d[0][0], e = d[0][1];

            for(int k = 0; k < x; ++k)
                if(d[k][0] - w + d[k][1] - e > 0)
                    ++p;

            if(p == y)
            {
                cout << "Possible" << endl;
                for(int q = 0; q < x; ++q)
                    cout << d[a[q][0]][0] << " ";
                cout << endl;
                for(int q = 0; q < x; ++q)
                    cout << d[a[q][1]][1] << " ";
                cout << endl;
                return 0;
            }
        }
    }
    write();
    return 0;
}