open( DAT, "data.dat" ) or die "Can't open data.dat: $!\n";
my( @left, @right );
while( <DAT> ) {
chomp;
if( /^block/ ) {
push @{$_}, "block" foreach \@left, \@right;
next;
}
my( $left, $right ) = split( /,/ );
foreach( $left, $right ) {
s/^\s+//; s/\s+$//;
}
push @left, $left; push @right, $right;
}
close( DAT );
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