Advent of Code Day 2

def parse_input(filename):
    with open(filename, "r") as f:
        lines = f.readlines()
    return lines

def part_one():
    valids = 0
    lines = parse_input("input.txt")
    for line in lines:
        line_range = line.split(" ")[0]
        letter = line.split(" ")[1][0]
        password = line.split(" ")[2]
        start = int(line_range.split("-")[0])
        end = int(line_range.split("-")[1]) + 1
        pwd_range = list(range(start, end))
        occurrence = password.count(letter)
        if occurrence in pwd_range:
            valids += 1
    return valids

def part_two():
    valids = 0
    lines = parse_input("input.txt")
    for line in lines:
        line_range = line.split(" ")[0]
        pos1 = int(line_range.split("-")[0]) - 1
        pos2 = int(line_range.split("-")[1]) - 1
        letter = line.split(" ")[1][0]
        password = line.split(" ")[2]
        if password[pos1] == letter and password[pos2] == letter:
            continue
        if password[pos1] == letter or password[pos2] == letter:
            valids += 1
    return valids