#!/usr/bin/python

import sys

def entity_quote(txt):
    return txt.replace("&", "&amp;").replace("<", "&lt;").replace(">", "&gt;")

def wrap(elem, txt):
    return "<%s>%s</%s>" % (elem, entity_quote(txt), elem)

def do_a_slide(f):
    print "<slide>"
    for line in f:
        if line == "\n":
            print "</slide>"
            break
        elif line.startswith("= "):
            print wrap("header", line[2:].rstrip())
        elif line.startswith("* "):
            print wrap("bullet", line[2:].rstrip())
        elif line.startswith("+ "):
            print wrap("subbullet", line[2:].rstrip())
        elif line.startswith("@ "):
            # handle .find("@") to construct mailto: urls
            print wrap("url", line[2:].rstrip())
        elif line.startswith("| "):
            print wrap("raw", line[2:].rstrip())
        else:
            sys.exit("Slide Huh?" + line)
    else:
        raise EOFError()

def do_a_header(f):
    print "\n".join(["<?xml version='1.0'?>"
                     '<!DOCTYPE slideshow SYSTEM "xslides.dtd">'
                     '<slideshow>'])
    for line in f:
        if line == "\n":
            break
        elif line.startswith("TITLE: "):
            print wrap("title", line.lstrip("TITLE:").strip())
        elif line.startswith("AUTHOR: "):
            print wrap("author", line.lstrip("AUTHOR:").strip())
        elif line.startswith("DATE: "):
            print wrap("date", line.lstrip("DATE:").strip())
        else:
            sys.exit("Header Huh?" + line)

def do_a_footer(f):
    print "\n".join(["</slide>", "</slideshow>"])

if __name__ == "__main__":
    f = sys.stdin
    do_a_header(f)
    try:
        while 1:
            do_a_slide(f)
    except EOFError:
        do_a_footer(f)