LIST
 FUNCTION
  IDENTIFIER (main)
  LIST
  BLOCK
   LIST
    PRINT_STATEMENT
     LIST
      NUMBER_LITERAL (20)
      STRING_LITERAL (" and ")
      NUMBER_LITERAL (40)
    PRINT_STATEMENT
     LIST
      STRING_LITERAL ("!")
      STRING_LITERAL ("\n")
    PRINT_STATEMENT
     LIST
      NUMBER_LITERAL (50)
      STRING_LITERAL (" and ")
      NUMBER_LITERAL (50)
      STRING_LITERAL ("\n")