from math import gcd
from decimal import Decimal

a = Decimal(input())
a1000 = int(1000 * a)

g = gcd(1000, a1000)
x = 1000 // g
y = a1000 // g
vertex = 'ABCA'[(x % 2) + (y % 2) * 2]
edge = x + y - 2 + abs(x - y) // 2 + (x + y) // 2
print(vertex, edge)