export c fn main() -> u8 {
    var dst: [5]u8 = [0_u8, 0_u8, 0_u8, 0_u8, 0_u8]
    let span: MutSpan<u8> = dst
    let filled: usize = std.mem.fill(span, 33_u8)
    let copied: usize = std.mem.copy(span, "token"[0..5])
    if filled == 5 {
        if copied == 5 {
            return dst[1]
        }
    }
    return 0_u8
}