+my @sorted = sort { $a->[0] cmp $b->[0] } @{ $lines_aref };
+cmp_deeply $sorted[0], [ '1963,5', 'S', 'EUR', '', '', '',
+ '1400', '8400', '', '1907', 'meine muh',
+ '', '', '', '', '', '', '', '', '',
+ '', '', '', '', '', '', '', '', '',
+ '', '', '', '', '', '', '', "K\x{e4}stchen",
+ '299', '','DE12345678', '', '', '',
+ '', '', '', '', '', '', '', '', '',
+ '', '', '', '', '', '', '', '', '',
+ '', '', '', '', '', '', '', '', '',
+ '', '', '', '', '', '', '', '', '',
+ '', '', '', '', '', '', '', '', '',
+ '', '', '', '', '', '', '', '', '',
+ '', '', '', '', '', '', '', '', '',
+ '', '', '', '', '', '', '', '', '',
+ '',
+ ];
+cmp_deeply $sorted[1], [ '535', 'S', 'EUR', '', '', '',
+ '1400', '8300', '', '1907','meine muh',
+ '', '', '', '', '', '', '', '', '',
+ '', '', '', '', '', '', '', '', '',
+ '', '', '', '', '', '', '', "K\x{e4}stchen",
+ '299', '','DE12345678', '', '', '',
+ '', '', '', '', '', '', '', '', '',
+ '', '', '', '', '', '', '', '', '',
+ '', '', '', '', '', '', '', '', '',
+ '', '', '', '', '', '', '', '', '',
+ '', '', '', '', '', '', '', '', '',
+ '', '', '', '', '', '', '', '', '',
+ '', '', '', '', '', '', '', '', '',
+ '', '', '', '', '', '', '', '', '',
+ '',
+ ];