text: '''	
  	Author : Arnob Mahmud
  
  	Mail : arnob.tech.me @ gmail.com
  '''
  
  a = {1, 2, 3, 4, 'c', 'f', 9}
  b = {2, 3, 4, 7, 9, 'g', 'h', 'j', 'm'}
  c = {0, 2, 4, 5, 'd', 'e', 'w', 8}
  
  union = a.union(b,c)
  print(union)