when {
            response.equals("higher", ignoreCase = true) ||response.equals("h", ignoreCase = true) ->
                return Response.HIGHER;
            response.equals("lower", ignoreCase = true) || response.equals("l", ignoreCase = true) ->
                return Response.LOWER;
            response.equals("yes", ignoreCase = true) || response.equals("y", ignoreCase = true) ->
                return Response.CORRECT
            else -> return Response.UNKNOWN;
        }