grep . Traditional Character Ranges.

commandline session

$ 4.2.20 2 502---> cat worked
Bubble sort
Selection sort
Insertion sort
Shell sort
Comb sort
Merge sort
Heapsort
Quicksort
Counting sort
 Bucket sort
 Radix sort
 Distribution sort
 Timsort
$ 4.2.20 3 503---> grep -h '^[A-Z]' worked
Bubble sort
Selection sort
Insertion sort
Shell sort
Comb sort
Merge sort
Heapsort
Quicksort
Counting sort
$ 4.2.20 4 504---> grep -h '^[-AZ]' worked
$ 4.2.20 5 505---> grep -h '^[-IZ]' worked
Insertion sort
$ 4.2.20 6 506--->

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