old_contents: import random
  
  vocab = [str(x) for x in range(100, 1000)]
  sw_train = open("sort.train.txt", "w")
  sw_test = open("sort.test.txt", "w")
  sw_valid = open("sort.valid.txt", "w")
  
  for i in range(1000000):
      seq = " ".join([vocab[random.randint(0, len(vocab) - 1)] for j in range(5)])
      k = i % 50
      if k == 0:
          sw_test.write(seq + "\n")
      elif k == 1:
          sw_valid.write(seq + "\n")
      else:
          sw_train.write(seq + "\n")
  
  sw_train.close()
  sw_test.close()
  sw_valid.close()
  
new_contents: # Licensed to the Apache Software Foundation (ASF) under one
  # or more contributor license agreements.  See the NOTICE file
  # distributed with this work for additional information
  # regarding copyright ownership.  The ASF licenses this file
  # to you under the Apache License, Version 2.0 (the
  # "License"); you may not use this file except in compliance
  # with the License.  You may obtain a copy of the License at
  #
  #   http://www.apache.org/licenses/LICENSE-2.0
  #
  # Unless required by applicable law or agreed to in writing,
  # software distributed under the License is distributed on an
  # "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
  # KIND, either express or implied.  See the License for the
  # specific language governing permissions and limitations
  # under the License.
  
  import random
  
  vocab = [str(x) for x in range(100, 1000)]
  sw_train = open("sort.train.txt", "w")
  sw_test = open("sort.test.txt", "w")
  sw_valid = open("sort.valid.txt", "w")
  
  for i in range(1000000):
      seq = " ".join([vocab[random.randint(0, len(vocab) - 1)] for j in range(5)])
      k = i % 50
      if k == 0:
          sw_test.write(seq + "\n")
      elif k == 1:
          sw_valid.write(seq + "\n")
      else:
          sw_train.write(seq + "\n")
  
  sw_train.close()
  sw_test.close()
  sw_valid.close()
  
subject: add license to new file (#7599)