List of states:

[AL] Alabama
[AK] Alaska
[AZ] Arizona
[FL] Florida
[GA] Georgia
[HI] Hawaii
[ID] Idaho
[IN] Indiana
[IA] Iowa
[KS] Kansas
[ME] Maine
[MT] Montana
[NV] Nevada
[OH] Ohio
[OR] Oregon
[TX] Texas
[UT] Utah
[VT] Vermont
[WY] Wyoming

List of cities in Iowa:

Adel, IA 50003
Alta, IA 51002
Ames, IA 50010
Ames, IA 50014
Bode, IA 50519
Burt, IA 50522
Clio, IA 50052
Coin, IA 51636
Colo, IA 50056
Dana, IA 50064
Dike, IA 50624
Doon, IA 51235
Dows, IA 50071
Elma, IA 50628
Ely, IA 52227
Galt, IA 50101
Gray, IA 50110
Hull, IA 51239
Leon, IA 50144
Milo, IA 50166
Olds, IA 52647
Olin, IA 52320
Otho, IA 50569
Oto, IA 51044
Palo, IA 52324
Peru, IA 50222
Rake, IA 50465
Rudd, IA 50471
Ryan, IA 52330
Swan, IA 50252
Tama, IA 52339
Thor, IA 50591
Ute, IA 51060
Vail, IA 51465
Webb, IA 51366
Yale, IA 50277