⟩ How to extract "information" from "ccccccccaaabbbbaaaabbinformationabcaaaaaabbbbbbbccbb" in tcl using a single command?
% set
a "ccccccccaaabbbbaaaabbinformationabcaaaaaabbbbbbbccbb"
ccccccccaaabbbbaaaabbinformationabcaaaaaabbbbbbbccbb
% set b [string trimleft $a "abc"]
informationabcaaaaaabbbbbbbccbb
% set c [string trimright $b "abc"]
information
OR..
% set output [string trimright [string trimleft
$a "abc"] "abc"]
information
%
