lines = (x.strip() for x in open("input.txt"))

high = 0


def parse_binary_string(string: str, ones):
    length = len(string) - 1
    cnt = 0
    for idx, val in enumerate(string):
        cnt += 2 ** (length-idx) if val == ones else 0
    return cnt


for line in lines:
    row = parse_binary_string(line[:7], ones="B")
    col = parse_binary_string(line[7:], ones="R")
    num = row * 8 + col
    high = max(num, high)

print(high)