data = open("t.txt","r")
list1 = []
while True:
    text = data.readline()
    count = {
        "a": [],
        "b": [],
        "c": [],
        "d": []
    }
    for item in count:
        if item in text or "Subject" in text:
            list1.append(text)
data.close()
print(list1)