SOS游戏tkinter问题，检查确认SOS是否已在列表范围内

matrix = [['S', 'O', 'S'], ['O', 'S', 'O'], ['S', 'O', 'S']]

def check_SOS(matrix):
    count = 0
    for i in range(len(matrix)):
        for j in range(len(matrix[i])):
            if matrix[i][j] == 'S':
                # 检查水平方向
                if j + 2 < len(matrix[i]) and matrix[i][j+1] == 'O' and matrix[i][j+2] == 'S':
                    count += 1
                # 检查垂直方向
                if i + 2 < len(matrix) and matrix[i+1][j] == 'O' and matrix[i+2][j] == 'S':
                    count += 1
                # 检查对角线方向
                if i + 2 < len(matrix) and j + 2 < len(matrix[i]) and matrix[i+1][j+1] == 'O' and matrix[i+2][j+2] == 'S':
                    count += 1
    return count

sos_count = check_SOS(matrix)
if sos_count > 0:
    print("SOS已在列表范围内，出现次数为", sos_count)
else:
    print("SOS未在列表范围内")