from lib import get_data


def part_1(data):
    rs = []
    for line in data.splitlines():
        rl, ru = 0, 127
        cl, cu = 0, 7
        for c in line.strip():
            rh = (ru - rl) // 2
            ch = (cu - cl) // 2
            if c == "B":
                rl = rl + rh + 1
            elif c == "F":
                ru = rl + rh
            elif c == "R":
                cl = cl + ch + 1
            elif c == "L":
                cu = cl + ch
            else:
                assert False
        assert rl == ru
        assert cl == cu
        r_new = rl * 8 + cl
        rs.append(r_new)

    print(max(rs))
    rs = sorted(rs)
    for i in range(len(rs) - 1):
        if rs[i] + 1 != rs[i + 1]:
            print(rs[i] + 1)


def main():
    data = get_data(__file__)
    part_1(data)


if __name__ == "__main__":
    main()