input: Write a function to find specific substrings within a given string.
  assert find_substrings(['language'], 'python language') == 'Matched!'
  assert find_substrings(['program'], 'python language') == 'Not Matched!'
  assert find_substrings(['python'], 'programming language') == 'Not Matched!'
output: def find_substrings(substrings, main_string):
      for substring in substrings:
          if substring in main_string:
              return "Matched!"
      return "Not Matched!"