alert: test01a - Tests insert, list and size
insert(94, BWI) into [H1]: successful
list[H1]:
  (94, BWI) [1]
  []
  []
Formatted structure:
  (94, BWI) [1]
size[H1]: 1
insert(88, LAX) into [H1]: successful
list[H1]:
  (94, BWI) [2]
  []
  (88, LAX) [1]
  []
  []
Formatted structure:
  (94, BWI) [2]
  | (88, LAX) [1]
size[H1]: 2
insert(42, IAD) into [H1]: successful
list[H1]:
  (94, BWI) [3]
  (42, IAD) [1]
  []
  []
  (88, LAX) [1]
  []
  []
Formatted structure:
  | (42, IAD) [1]
  (94, BWI) [3]
  | (88, LAX) [1]
size[H1]: 3
insert(67, DCA) into [H1]: successful
list[H1]:
  (94, BWI) [4]
  (88, LAX) [1]
  []
  []
  (67, DCA) [2]
  []
  (42, IAD) [1]
  []
  []
Formatted structure:
  | (88, LAX) [1]
  (94, BWI) [4]
  | (67, DCA) [2]
  | | (42, IAD) [1]
size[H1]: 4
insert(27, JFK) into [H1]: successful
list[H1]:
  (94, BWI) [5]
  (88, LAX) [2]
  []
  (27, JFK) [1]
  []
  []
  (67, DCA) [2]
  []
  (42, IAD) [1]
  []
  []
Formatted structure:
  | (88, LAX) [2]
  | | (27, JFK) [1]
  (94, BWI) [5]
  | (67, DCA) [2]
  | | (42, IAD) [1]
size[H1]: 5
insert(48, ATL) into [H1]: successful
list[H1]:
  (94, BWI) [6]
  (67, DCA) [2]
  []
  (42, IAD) [1]
  []
  []
  (88, LAX) [3]
  (48, ATL) [1]
  []
  []
  (27, JFK) [1]
  []
  []
Formatted structure:
  | (67, DCA) [2]
  | | (42, IAD) [1]
  (94, BWI) [6]
  | | (48, ATL) [1]
  | (88, LAX) [3]
  | | (27, JFK) [1]
size[H1]: 6
insert(19, SFO) into [H1]: successful
list[H1]:
  (94, BWI) [7]
  (67, DCA) [3]
  (19, SFO) [1]
  []
  []
  (42, IAD) [1]
  []
  []
  (88, LAX) [3]
  (48, ATL) [1]
  []
  []
  (27, JFK) [1]
  []
  []
Formatted structure:
  | | (19, SFO) [1]
  | (67, DCA) [3]
  | | (42, IAD) [1]
  (94, BWI) [7]
  | | (48, ATL) [1]
  | (88, LAX) [3]
  | | (27, JFK) [1]
size[H1]: 7
