until -package:numeric-prelude -package:streaming -package:yesod-paginator -package:mixed-types-num -package:intro -package:xmonad-contrib -package:conferer -package:free -package:github -package:termonad -package:elerea package:dunai
Similar to Yampa's delayed switching. Loses a b in case of an
exception.
Run the first
msf until the second one produces
True
from the output of the first.