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from random import choice
def random_avoid_bot(board, position):
x, y = position
height = len(board)
width = len(board[0])
valid_moves = []
left = board[y][(x - 1) % width]
if left == '.' or left == '*':
valid_moves.append('L')
right = board[y][(x + 1) % width]
if right == '.' or right == '*':
valid_moves.append('R')
up = board[(y - 1) % height][x]
if up == '.' or up == '*':
valid_moves.append('U')
down = board[(y + 1) % height][x]
if down == '.' or down == '*':
valid_moves.append('D')
return choice(valid_moves)
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