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i can't understand the test data

Posted by suby at 2005-12-18 09:25:56 on Problem 2188 
is'nt that mean this?
1-4,2-3,3-2,4-1 
then 
1-4,2-3,3-2,4-1 
1-3,2-4,3-2,4-1 
1-3,2-4,3-1,4-2 
1-3,2-1,3-4,4-2 
1-1,2-2,3-4,4-3 
1-1,2-2,3-3,4-4

 
is'nt that the shortest way?
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