How to remove the first two characters in a string

Hi, I know how to choose a folder. But what I don’t know how to code is how to remove the first two characters of all the files in a chosen folder. Can someone guide me the in the path. I’m guessing this code will have to be a loop like repeat code.
Thanks in advance.

this is what i found. i just thought i would share this with all of of you all

set theFolder to choose folder
set theResult to display dialog “remove characters in name :” buttons {“Cancel”, “End”, “Beginning”} default answer 1 cancel button “Cancel”
set btn to button returned of theResult
set nCharacters to text returned of theResult as integer
if btn = “End” then set nCharacters to -nCharacters

tell application “Finder”
repeat with thisFile in (get document files in theFolder)
set theFullName to name of thisFile
set {oldTID, AppleScript’s text item delimiters} to {AppleScript’s text item delimiters, “.”}
if (count of text items of theFullName) > 1 then
set properName to my trim((text items 1 thru -2 of theFullName) as text, nCharacters)
set revisedName to ({properName, (get last text item of theFullName)}) as text
else
set revisedName to my trim(theFullName, nCharacters)
end if
set AppleScript’s text item delimiters to oldTID
set name of thisFile to revisedName
end repeat
end tell

on trim(t, n)
if n > 0 then
return text (n + 1) thru -1 of t
else
return text 1 thru (n - 1) of t
end if
end trim