new_contents: 
  table = []
  
  n, m = map(int, input().split())
  
  for i in range(n):
      row = list(map(int, input().split()))
      table.append(row)
  
  k = int(input())
  
  table.sort(key=lambda x: x[k])
  
  for row in table:
      print(*row)
  
subject: Add Tensor Flow