What does this Zig snippet output?

1const std = @import("std");
2pub fn main() void {
3    const a = [_]u8{ 1, 2 };
4    const b = a ** 3;
5    std.debug.print("{d}\n", .{b.len});
6    for (b) |v| {
7        std.debug.print("{d} ", .{v});
8    }
9    std.debug.print("\n", .{});
10}