#include <iostream>
using namespace std;

int main()
{
    int a[21][21],m,n,i,j, mn, mx, cm, cx;
    cin >> m >> n;

    for (i=0; i<m; i++)
      for (j=0; j<n; j++)
          cin >> a[i][j];

    for (i=0; i<m; i++) {
      mn=mx=a[i][0];
      cm=cx=0;
      for (j=1; j<n; j++) {
        if (mn>a[i][j]) {
          mn=a[i][j];
          cm=j;
        }
        if (mx<a[i][j]) {
          mx=a[i][j];
          cx=j;
        }
      }
      mn=a[i][0];
      a[i][0]=a[i][cx];
      a[i][cx]=mn;

      mx=a[i][n-1];
      a[i][n-1]=a[i][cm];
      a[i][cm]=mx;
    }

     for (i=0; i<m; i++) {
        cout << endl;
      for (j=0; j<n; j++)
        cout << a[i][j] << " ";
     }
    return 0;
}