Microsoft Windows [Version 10.0.17763.805]
(c) 2018 Microsoft Corporation. All rights reserved.

C:\Users\tblaz\Documents\evelyn>perl 3.letters.pl
Empty board:
..........
..........
..........
..........
..........
..........
..........
..........
..........
..........
tiles: m l i r p g m

matches:

gimp gip girl glim grim grip imp li limp lip mi mig mil mim mir pi pig prig prim rig rim rip

C:\Users\tblaz\Documents\evelyn>