input: Write a python function to detect malicious HTTP requests using Python.
  assert detect_malicious_requests("http://example.com/index.exe") == "MALICIOUS"
  assert detect_malicious_requests("http://example.com/index.xml") == "SUSPICIOUS"
  assert detect_malicious_requests("http://example.com/index.html") == "SAFE"
  assert detect_malicious_requests("http://example.com/secure.php") == "MALICIOUS"
output: def detect_malicious_requests(url):
      malicious_extensions = ['exe', 'php']
      suspicious_extensions = ['xml']
      
      extension = url.split('.')[-1]
      
      if extension in malicious_extensions:
          return "MALICIOUS"
      elif extension in suspicious_extensions:
          return "SUSPICIOUS"
      else:
          return "SAFE"