with open("input") as f:
    lines = [n.strip() for n in f.readlines()]

solution = 0

for line in lines:
    char_count = 0
    i = 1
    while i < len(line) - 1:
        char = line[i]
        if char == "\\":
            next_char = line[i + 1]
            if next_char in ["\\", '"']:
                i += 1
            elif next_char in ["x"]:
                i += 3
        char_count += 1
        i += 1

    literal_count = len(line)

    print(f"{line}: {literal_count=}, {char_count=}")
    solution += literal_count - char_count

print(solution)