#!/usr/bin/env python3

import sys
from functools import reduce

def bp(l):
    return reduce(lambda a, b: a*2 + (b in 'BR'), (0, *list(l)))

fn = sys.argv[1] if len(sys.argv) > 1 else 'input5'
with open(fn) as f:

    lines = [l.strip() for l in f.readlines()]
    sl = sorted(bp(l) for l in lines)
    print(sl[-1])
    print(next(a+1 for a, b in zip(sl, sl[1:]) if a + 1 != b))