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#!/usr/bin/perl -w
use strict;
...
__DATA__
1.8 2.5 3.8 1.9 -3.5 -3.5 3.2 -3.9 4.2 4.5 2.8
-1.3 -0.9 -0.7 -0.4 -0.8 -3.5 -3.5 -1.6 -4.5