my $materials = bag flat 'wood' xx 300, 'glass' xx 100, 'brick' xx 3000;

    my @wanted =
        bag(flat 'wood' xx 200, 'glass' xx 50, 'brick' xx 3000) but "house",
        bag(flat 'wood' xx 100, 'glass' xx 50)                  but "shed",
        bag(     'wood' xx 50)                                  but "dog-house";

    say 'I can build...';
    .put for @wanted.combinations.grep: { $materials ≽ [⊎] |$^stuff-we-want };