states.py

from itertools import combinations
from string import ascii_uppercase

states = ["Alabama", "Alaska", "Arizona", "Arkansas", "California", 
          "Colorado", "Connecticut", "Delaware", "Florida", "Georgia",
          "Hawaii", "Idaho", "Illinois", "Indiana", "Iowa",
          "Kansas", "Kentucky", "Louisiana", "Maine", "Maryland",
          "Massachusetts", "Michigan", "Minnesota", "Mississippi", "Missouri",
          "Montana", "Nebraska", "Nevada", "New Hampshire", "New Jersey",
          "New Mexico", "New York", "North Carolina", "North Dakota", "Ohio",
          "Oklahoma", "Oregon", "Pennsylvania", "Rhode Island", "South Carolina",
          "South Dakota", "Tennessee", "Texas", "Utah", "Vermont",
          "Virginia", "Washington", "West Virginia", "Wisconsin", "Wyoming" ]

rows = []
for x,y in combinations(ascii_uppercase, 2):
    count = 0
    for state in states:
        state = state.upper()
        if x not in state and y not in state:
            count += 1
    rows.append((count, x, y))

for row in sorted(rows):
    print("%2d  %s %s" % row)