--for https://www.lua.org/cgi-bin/demo
h="0123456789abcdef"
p="/Q/6553565536"
io.write(p:sub(0,3)..'\n')
if
 p:sub(0,3)=="/Q/"
then
 q=p:sub(4)
 x=0
 for i=1,math.min(12,q:len()) do
  x=q:byte(i)-48+x*10
 end
 io.write(x..'\n')
 s=''
 repeat
  y=(x&15)+1
  s=h:sub(y,y)..s
  x=x>>4
 until x==0
 io.write('/qx/'..s)
end