#pragma GCC optimize ("Ofast")
#include<bits/stdc++.h>
using namespace std;
void *wmem;
char memarr[96000000];
template<class T> inline void walloc1d(T **arr, int x, void **mem = &wmem){
  static int skip[16] = {0, 15, 14, 13, 12, 11, 10, 9, 8, 7, 6, 5, 4, 3, 2, 1};
  (*mem) = (void*)( ((char*)(*mem)) + skip[((unsigned long long)(*mem)) & 15] );
  (*arr)=(T*)(*mem);
  (*mem)=((*arr)+x);
}
template<class T1> void sortA_L(int N, T1 a[], void *mem = wmem){
  sort(a, a+N);
}
inline int my_getchar_unlocked(){
  static char buf[1048576];
  static int s = 1048576;
  static int e = 1048576;
  if(s == e && e == 1048576){
    e = fread_unlocked(buf, 1, 1048576, stdin);
    s = 0;
  }
  if(s == e){
    return EOF;
  }
  return buf[s++];
}
inline void rd(int &x){
  int k;
  int m=0;
  x=0;
  for(;;){
    k = my_getchar_unlocked();
    if(k=='-'){
      m=1;
      break;
    }
    if('0'<=k&&k<='9'){
      x=k-'0';
      break;
    }
  }
  for(;;){
    k = my_getchar_unlocked();
    if(k<'0'||k>'9'){
      break;
    }
    x=x*10+k-'0';
  }
  if(m){
    x=-x;
  }
}
struct MY_WRITER{
  char buf[1048576];
  int s;
  int e;
  MY_WRITER(){
    s = 0;
    e = 1048576;
  }
  ~MY_WRITER(){
    if(s){
      fwrite_unlocked(buf, 1, s, stdout);
    }
  }
}
;
MY_WRITER MY_WRITER_VAR;
void my_putchar_unlocked(int a){
  if(MY_WRITER_VAR.s == MY_WRITER_VAR.e){
    fwrite_unlocked(MY_WRITER_VAR.buf, 1, MY_WRITER_VAR.s, stdout);
    MY_WRITER_VAR.s = 0;
  }
  MY_WRITER_VAR.buf[MY_WRITER_VAR.s++] = a;
}
inline void wt_L(char a){
  my_putchar_unlocked(a);
}
inline void wt_L(int x){
  int s=0;
  int m=0;
  char f[10];
  if(x<0){
    m=1;
    x=-x;
  }
  while(x){
    f[s++]=x%10;
    x/=10;
  }
  if(!s){
    f[s++]=0;
  }
  if(m){
    my_putchar_unlocked('-');
  }
  while(s--){
    my_putchar_unlocked(f[s]+'0');
  }
}
int H;
int W;
int A[100][100];
int arr[10000];
int main(){
  int i;
  wmem = memarr;
  rd(H);
  rd(W);
  {
    int Lj4PdHRW;
    int KL2GvlyY;
    for(Lj4PdHRW=(0);Lj4PdHRW<(H);Lj4PdHRW++){
      for(KL2GvlyY=(0);KL2GvlyY<(W);KL2GvlyY++){
        rd(A[Lj4PdHRW][KL2GvlyY]);
      }
    }
  }
  for(i=(0);i<(H);i++){
    int j;
    for(j=(0);j<(W);j++){
      arr[i*W+j] = A[i][j];
    }
  }
  sortA_L(H*W, arr);
  for(i=(0);i<(H);i++){
    int j;
    for(j=(0);j<(W);j++){
      A[i][j] = arr[i*W+j];
    }
  }
  {
    int hCmBdyQB;
    int V9aVTaxx;
    for(hCmBdyQB=(0);hCmBdyQB<(H);hCmBdyQB++){
      if(W==0){
        wt_L('\n');
      }
      else{
        for(V9aVTaxx=(0);V9aVTaxx<(W-1);V9aVTaxx++){
          wt_L(A[hCmBdyQB][V9aVTaxx]);
          wt_L(' ');
        }
        wt_L(A[hCmBdyQB][V9aVTaxx]);
        wt_L('\n');
      }
    }
  }
  return 0;
}
// cLay varsion 20200509-1

// --- original code ---
// int H, W, A[100][100];
// int arr[10000];
// {
//   rd(H,W,A(H,W));
//   rep(i,H) rep(j,W) arr[i*W+j] = A[i][j];
//   sortA(H*W, arr);
//   rep(i,H) rep(j,W) A[i][j] = arr[i*W+j];
//   wt(A(H,W));
// }