What does this Zig snippet output?

1const std = @import("std");
2pub fn main() void {
3    const v: @Vector(4, i32) = .{ 1, 2, 3, 4 };
4    const shifted = v << @as(@Vector(4, u5), @splat(1));
5    std.debug.print("{d} {d} {d} {d}\n", .{ shifted[0], shifted[1], shifted[2], shifted[3] });
6}