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