Exercise: sort mixed string 2
Take the above example and change it so now we'll take in account the letter too. Sort the strings based on the first letter, and among values with the same leading letter, sort them according to the numbers.
A4 B1 A3 A27
A3 A4 A27 B1
Expected output from sample file
A1 A3 A27 A38 B1 B3 B12 C1