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, string):
      for substring in substrings:
          if substring in string:
              return 'Matched!'
      return 'Not Matched!'