x1 of mrilu is the sender of the mail, I think. x2 is the mail itself. I don't know what x3 and x4 are. I think x3 is the recipient, but then I don't know what x4 is. I also don't know if x1 and x3 can be stations in the mail network. -Robin -- http://www.digitalkingdom.org/~rlpowell/ *** http://www.lojban.org/ Reason #237 To Learn Lojban: "Homonyms: Their Grate!"