bs = set()
with open("C:\\Users\\Administrator\\Desktop\\板块对应.txt", encoding="utf-8") as f:
    lines = f.readlines()

    for line in lines:
        if line:
            line = line.replace("，", ",").replace("丨","|").strip()
            if line.find("|") >= 0:
                bs |= set(line.split("|")[0].split(","))
                line = line[1]

            bs |= set(line.split(","))
    # print(bs)

bs1=set()
with open("C:\\Users\\Administrator\\Desktop\\板块对应1.txt", encoding="utf-8") as f:
    lines = f.readlines()

    for line in lines:
        if line:
            line = line.replace("，", ",").strip()
            if line.find("|") >= 0:
                bs1 |= set(line.split("|")[0].split(","))
                line = line[1]

            bs1 |= set(line.split(","))
    # print(bs1)
bs2 = bs-bs1
print(len(bs2))
for b in bs2:
    print(b)