@iwalion 5/ Dyck language related to Dyck paths including random walks: https://t.co/nSi6e9rsog Extended n-D/n-states/n-kinds-of-parentheses Dyck language: https://t.co/FZ2lwBwvHU (See Section 3.) https://t.co/ioPjBjbOLW (Click the orange button below.)