Qsubstr
From EDukeWiki
qsubstr <quote1> <quote2> <start> <length>
Copy a substring of <quote2> to <quote1>, beginning at position <start> and continuing for <length> characters.
qsubstr <quote1> <quote2> <start> <length>
Copy a substring of <quote2> to <quote1>, beginning at position <start> and continuing for <length> characters.
