...##. # .....# # #. #....##.. #.. ####....... # . #.. ..#.....# # ..§ ...#.#.... .#.. #.. # #..##.#### ..# #.. # ## .# #..b#.#.#.#.# #..##.. # . #.##..#.....# ... #...#. .# # #...#.#... ##..... ..§ # #.##..4#...... #. #.# . .. #....##..# ..## #.. .. . #..# . #X####.# ##.##.#. . #..# #..............#.#.#. .### ## . ........#...##X# . #X##..# . . .#.#.###.. .X# #.. . .## . #.#.#. ...# ....... ..# .. # #. #.# ##...##.##.#.###.. . ##.#. #. ###. .. ## . # #. . #∩#..## . ### # # . . # # .# #.#.# .# #. .#