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use strict;
use warnings;
my @CPU_SPLIT = split /\s+/, $CPU;     # split the string on one or mo
+re spaces
# ~ s\ //g;                            # this line does not make any s
+ense to me, commented out.
my $result = join ' ', @CPU_SPLIT;     # join can operate directly on 
+an array, no need to list the indices