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-1 2 ereu
1 2 rerer
...
8 3 ffder
1 4 rrtrr
1 4 rree

-1 2 ereu
-1 2 wwwew
-9 3 wwss
1 4 rrtrr
1 4 rree

#! usr/bin/perl
use warnings;
...
                   }

 print "$min\n";