Unstack

Usage: stack <what>
       stack <what> for <who>
       stack <what> sell <nnn>
       unstack <what>
  e.g. stack all plank

With the stack command you can pile up a bunch of logs, stones, or certain
other items into a neat pile that will survive a reboot. There is a limit
to how many piles you can have. With the optional 'for <who>' you can
specify someone other than yourself that is also allowed to unstack the
pile. With the optional 'sell <nnn>' anyone can buy the pile for <nnn>
silver.