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1.
Colorado borders Oklahoma
2.
Montana borders Kansas
3.
Illinois borders Tennessee
4.
Michigan borders Wisconsin
5.
Massachusetts borders Rhode Island
6.
Florida borders Mississippi
7.
Minnesota borders Michigan
9.
Idaho borders Washington
10.
Kentucky borders West Virginia
11.
Maryland borders Delaware
12.
Vermont borders Connecticut
13.
Pennsylvania borders New Jersey
14.
Wyoming borders North Dakota
15.
Georgia borders North Carolina