avenues = 7 streets = 7 robot = (1, 1, 'E', 0) walls = [] beepers = { (7, 3): 1, (6, 6): 1, (5, 6): 1, (3, 2): 1, (2, 1): 1, (6, 2): 1, (5, 1): 1, (2, 5): 1, (7, 2): 1, (5, 5): 1, (7, 6): 1, (4, 4): 1, (3, 6): 1, (2, 2): 1, (3, 5): 1, (4, 1): 1, (6, 4): 1, (5, 4): 1, (7, 1): 1, (4, 5): 1, (2, 3): 1, (4, 2): 1, (6, 5): 1, (5, 3): 1, (4, 6): 1, (6, 1): 1, (7, 4): 1, (4, 3): 1, (3, 4): 1, (2, 4): 1 }