input: Write a function to determine if the first string contains the second string. If it contains return True else return False.
  assert check_contains("catering", "cat")==True
  assert check_contains("train", "cat")==False
  assert check_contains("cartoon", "cat")==False
  assert check_contains("random string", "")==True
  assert check_contains("", "cat")==False
output: def check_contains(first, second):
      return second in first