ADRIAN = "ABC" * 34
BRUNO = "BABC" * 25
GORAN = "CCAABB" * 17

n = int(input())
answers = input()
adrian_score = bruno_score = goran_score = 0
for i in range(n):
    if answers[i] == ADRIAN[i]:
        adrian_score += 1
    if answers[i] == BRUNO[i]:
        bruno_score += 1
    if answers[i] == GORAN[i]:
        goran_score += 1

max_score = max((adrian_score, bruno_score, goran_score))
print(max_score)
if adrian_score == max_score:
    print("Adrian")
if bruno_score == max_score:
    print("Bruno")
if goran_score == max_score:
    print("Goran")