var story = ARGF.slurp;

var blanks = Hash.new;
while (var m = /<(.*?)>/.gmatch(story)) {
    blanks.append(m[0]);
}

blanks.keys.sort.each { |blank|
    var replacement = Sys.scanln("#{blank}: ");
    blanks{blank} = replacement;
}

print story.gsub(/<(.*?)>/, {|s1| blanks{s1} });