This seems like what you want:

#! /usr/bin/perl
use strict;
use warnings;
use Data::Dumper;

my $str; do { local $/; $str = <DATA>; };
my $hash = { split /\s+/, $str };
print Dumper $hash;

__DATA__
ER 
  34
9YT
  44
EE
  66
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Those who know that they are profound strive for clarity. Those who
would like to seem profound to the crowd strive for obscurity.
            --Friedrich Nietzsche