from math import gcd
a, b = map(int, input().split('.'))
t = a * 1000 + b
g = gcd(t, 1000)
y = t // gcd(t, 1000)
x = 1000 // gcd(t, 1000)
c = x + y - 2 + (x + y) // 2 + abs(x - y) // 2
if (x + y) % 2 == 0:
    print('A', c)
elif x % 2 == 0:
    print('C', c)
else:
    print('B', c)