java.lang.StringIndexOutOfBoundsException: String index out of range: -6
	at java.lang.String.substring(String.java:1768)
	at nomopoly3.Rules.handleGet(Rules.java:34)
	at q17.server.http.HttpBranchServer.handleGet(HttpBranchServer.java:46)
	at q17.server.http.HttpServer.handleConnection(HttpServer.java:312)
	at q17.server.Server$ConnectionDispatcher.run(Server.java:209)