import random

def generate_board(size=4):

if size % 2 != 0:

raise ValueError("Size must be even")

letters = [chr(i) for i in range(65, 65 + (size * size // 2))]

board = letters + letters

random.shuffle(board)

return [board[i:i + size] for i in range(0, len(board), size)]

def print_board(board, revealed):

for row_idx, row in enumerate(board):

for col_idx, cell in enumerate(row):

if revealed[row_idx][col_idx]:

print(cell, end=' ')

else:

print('_', end=' ')

print()

def get_choice(board):

while True:

try:

row, col = map(int, input("Enter row and column (e.g. '1 2'): ").split())

if row >= 1 and row <= len(board) and col >= 1 and col <= len(board[0]):

return row - 1, col - 1

else:

print("Invalid choice. Try again.")

except ValueError:

print("Invalid input. Enter row and column numbers separated by space.")

def memory_puzzle():

board = generate_board()

revealed = [[False] * len(board) for _ in range(len(board))]

moves = 0

while not all(all(row) for row in revealed):

print_board(board, revealed)

print("Choose the first card to flip.")

row1, col1 = get_choice(board)

revealed[row1][col1] = True

print_board(board, revealed)

print("Choose the second card to flip.")

row2, col2 = get_choice(board)

if (row1, col1) == (row2, col2):

print("You chose the same card. Choose a different second card.")

continue

revealed[row2][col2] = True

print_board(board, revealed)

if board[row1][col1] != board[row2][col2]:

print("Not a match.")

revealed[row1][col1] = False

revealed[row2][col2] = False

else:

print("It's a match!")

moves += 1

print(f"Congratulations! You completed the game in {moves} moves.")

if __name__ == "__main__":

memory_puzzle()