%encountered = (
                 '3' => [
                          '1 2 3 - 4'
                        ],
                 '2' => [
                          '1 2 3 - 4'
                        ],
                 '18' => [
                           'Hello, i\'m 18'
                         ],
                 '4' => [
                          '1 2 3 - 4'
                        ],
                 '1' => [
                          '1 this year is 2019 1',
                          '1 this year is 2019 1',
                          '1 2 3 - 4'
                        ],
                 '2019' => [
                             '1 this year is 2019 1'
                           ]
               );
  at 11103133.pl line 16, <DATA> line 3.
2019: '1 this year is 2019 1'
18: 'Hello, i'm 18'
4: '1 2 3 - 4'
3: '1 2 3 - 4'
2: '1 2 3 - 4'
1: '1 this year is 2019 1', '1 this year is 2019 1', '1 2 3 - 4'