my @indexes_of_files = (
	# terminology: index 0 == "file offset, index 1 == "file name"
	[ qw( 0  file_a.txt ) ],
	[ qw( 10 file_b.txt ) ],
	[ qw( 11 file_c.txt ) ],
	[ qw( 14 file_d.txt ) ],
	[ qw( 19 file_e.txt ) ],
);

my $total_number_of_words = 29;