Problem 01: #!/usr/bin/perl use strict; use warnings; $_ = \"Let’s rent a bus!\"; s/(.)(\\w).*(\\2).*(.)$/$1$2$3$4/ ; print \"[\" ; print ; print \"]\"; exit; output : [Lee!] Solution Problem 01: #!/usr/bin/perl use strict; use warnings; $_ = \"Let’s rent a bus!\"; s/(.)(\\w).*(\\2).*(.)$/$1$2$3$4/ ; print \"[\" ; print ; print \"]\"; exit; output : [Lee!].