What 19 states make up tornado alley (abbreviations are fine)?

The 19 states that make up Tornado Alley are Texas (TX), Oklahoma (OK), Kansas (KS), Nebraska (NE), South Dakota (SD), North Dakota (ND), Iowa (IA), Missouri (MO), Arkansas (AR), Louisiana (LA), Mississippi (MS), Alabama (AL), Tennessee (TN), Kentucky (KY), Illinois (IL), Indiana (IN), Ohio (OH), Colorado (CO), and Florida (FL).