import math
y = int(input().replace('.', ''))
x = 1000
g = math.gcd(y, x)
y //= g
x //= g
char = 'A' if (x + y) % 2 == 0 else ('B' if x % 2 == 1 else 'C')
cnt = x + y - 2
cnt += abs(x - y) // 2
cnt += (x + y) // 2
print(char, cnt)