package main
import "io"
import "code.squareroundforest.org/arpio/wand"
func main() {
wand.Exec(func(in io.Reader) (out io.Reader) {
			out := bytes.NewBuffer(nil)
			buf := make([]byte, 1)
			for {
				n, err := in.Read(buf)
				if n == 1 {
					buf[0] = buf[0] * 2
					out.Write(buf)
				}

				if err != nil {
					return out
				}
			}

			return out
		})
}