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import random

def create_chessboard(position1, position2, movements):
    # Check if positions are valid
    if not is_valid_position(position1) or not is_valid_position(position2):
        raise ValueError("Invalid positions. Each position should be a tuple (x, y) where 0 <= x, y <= 7.")

    # Create an empty 8x8 chessboard
    chessboard = [['_ ' for _ in range(8)] for _ in range(8)]

    # Mark the destination position
    chessboard[position2[1]][position2[0]] = 'E '

    # Initialize position with starting coordinates
    x, y = position1

    # Mark the starting position
    chessboard[y][x] = 'S '

    # Perform the movements and mark the path with the number of moves
    move_count = 1
    for move in movements:
        if move == "u":
            y = (y-1) % 8
        elif move == "d":
            y = (y+1) % 8
        elif move == "l":
            x = (x-1) % 8
        elif move == "r":
            x = (x+1) % 80 
        if move_count < 10:
            chessboard[y][x] = str(move_count) + " "
        elif move_count >= 10:
            chessboard[y][x] = str(move_count)
        move_count += 1
    return chessboard



def is_valid_position(position):
    x, y = position
    return 0 <= x <= 7 and 0 <= y <= 7


def display_chessboard(chessboard):
    print("  x  0   1   2   3   4   5   6   7  ")
    print(" y +---+---+---+---+---+---+---+---+")
    for i, row in enumerate(chessboard):
        row_str = f"{i:2d} | {'| '.join(row)}|"
        print(row_str)
        print("   +---+---+---+---+---+---+---+---+")

def generate_random_string(length=16):
    characters = 'udlrn'
    random_string = ''.join(random.choice(characters) for _ in range(length))
    return random_string

if __name__ == "__main__":
    random.seed(10)
    try:
        pos1_x = random.randrange(8)#int(input("Enter the x-coordinate for the starting position (0-7): "))
        pos1_y = random.randrange(8)#int(input("Enter the y-coordinate for the starting position (0-7): "))
        pos2_x = random.randrange(8)#int(input("Enter the x-coordinate for the destination position (0-7): "))
        pos2_y = random.randrange(8)#int(input("Enter the y-coordinate for the destination position (0-7): "))
        position1 = (pos1_x, pos1_y)
        position2 = (pos2_x, pos2_y)
        chessboard_rand = create_chessboard(position1, position2, "")
        display_chessboard(chessboard_rand)

        movements_str = generate_random_string()#input("Enter the movement directions (u, d, l, r, n): ")
        print(movements_str)

        chessboard = create_chessboard(position1, position2, movements_str)
        display_chessboard(chessboard)

    except ValueError as e:
        print(f"Error: {e}")