#取出子列表
x, y, z = [
    ["RℯℱE", "DR✍O", "CK{❦"],
    ["I a", "m le♫a", "rn†‡in"],
    ["g Py✣✤✥t", "ho⇒⇓⇔⇕na", "t SR々E}"]
]

# 取出x
a1, a2, a3 = x

# 取出y
b1, b2, b3 = y

# 取出z
c1, c2, c3 = z

# 过滤
x1 = ''
for sub_str_list in x:           #遍历x中的每个字符串
    for char in sub_str_list:    #遍历x中的每个字符
        if char.isalnum() or char.isspace() or char in '{}':
            x1 += char
print(x1)

y1 = ''
for sub_str_list in y:
    for char in sub_str_list:
        if char.isalnum() or char.isspace() or char in '{}':
            y1 += char
print(y1)

z1 = ''
for sub_str_list in z:
    for char in sub_str_list:
        if char.isalnum() or char.isspace() or char in '{}':
            z1 += char
print(z1)

#连接
print(x1+y1+z1)

#输出，未过滤干净