from fractions import Fraction
from decimal import Decimal


def main():
    a = Fraction(int(1000 * Decimal(input())), 1000)
    p, q = a.denominator, a.numerator  # a=q/p
    cnt = p + q - 2 + (p + q) // 2 + abs(p - q) // 2

    """
    Aは(偶数, 偶数)または(奇数, 奇数)
    Bは(奇数, 偶数)
    Cは(偶数，奇数)
    """
    if (p + q) % 2 == 0:
        print("A", cnt)
    elif q % 2 == 0:
        print("B", cnt)
    else:
        print("C", cnt)


if __name__ == "__main__":
    main()