§. .## R3# ... ##.. .. .. #... #.# . . ...#.#. .. .#.# ....§ .##....... ##∩§#......#.. #..#..#...... #..##..###.# #....#...#.# ####...##.. # #...###....#.# ##....._... # #..##..#.#.# ...#.##.. #.# #..#.#...#...#. ...##..#.## #. ...# #.. .. . ..#. . . ..∩ .#. #. .