[Bloomington, IN]       [Allendale, NJ]   [Berkeley, CA]
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    [ Bucheon, KR][   |   ][  Seoul, KR  ][   |  ]       [     |    ]  
    0--1--2--3--4--5--6--7--8--9-10-11-12-13-14-15-16-17-18-19-20-21-22-23-24-------------
                                                  [  |  ]            [  | ][Berkeley, CA
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                                             [Carrollton, GA]     [Seattle, WA]