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diff --git a/exercises/57_unions3.zig b/exercises/57_unions3.zig
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--- a/exercises/57_unions3.zig
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-//
-// With tagged unions, it gets EVEN BETTER! If you don't have a
-// need for a separate enum, you can define an inferred enum with
-// your union all in one place. Just use the 'enum' keyword in
-// place of the tag type:
-//
-//     const Foo = union(enum) {
-//         small: u8,
-//         medium: u32,
-//         large: u64,
-//     };
-//
-// Let's convert Insect. Doctor Zoraptera has already deleted the
-// explicit InsectStat enum for you!
-//
-const std = @import("std");
-
-const Insect = union(InsectStat) {
-    flowers_visited: u16,
-    still_alive: bool,
-};
-
-pub fn main() void {
-    var ant = Insect{ .still_alive = true };
-    var bee = Insect{ .flowers_visited = 17 };
-
-    std.debug.print("Insect report! ", .{});
-
-    printInsect(ant);
-    printInsect(bee);
-
-    std.debug.print("\n", .{});
-}
-
-fn printInsect(insect: Insect) void {
-    switch (insect) {
-        .still_alive => |a| std.debug.print("Ant alive is: {}. ", .{a}),
-        .flowers_visited => |f| std.debug.print("Bee visited {} flowers. ", .{f}),
-    }
-}
-
-// Inferred enums are neat, representing the tip of the iceberg
-// in the relationship between enums and unions. You can actually
-// coerce a union TO an enum (which gives you the active field
-// from the union as an enum). What's even wilder is that you can
-// coerce an enum to a union! But don't get too excited, that
-// only works when the union type is one of those weird zero-bit
-// types like void!
-//
-// Tagged unions, as with most ideas in computer science, have a
-// long history going back to the 1960s. However, they're only
-// recently becoming mainstream, particularly in system-level
-// programming languages. You might have also seen them called
-// "variants", "sum types", or even "enums"!