until -package:numeric-prelude -package:language-bash -package:clash-prelude -package:utility-ht -package:intro -package:foundation -package:hosc -package:distribution-opensuse -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.