mod = 1000000007
eps = 10**-9


def main():
    import sys
    from math import gcd
    input = sys.stdin.readline

    a, b = input().split(".")
    a = int(a) * 1000 + int(b)

    g = gcd(a, 1000)
    upper = a // g
    lower = 1000 // g
    ans = upper - 1 + lower - 1 + (upper + lower) // 2 + abs(upper - lower) // 2
    if (upper + lower) % 2 == 0:
        S = "A"
    else:
        if lower & 1:
            S = "B"
        else:
            S = "C"
    print(S, ans)


if __name__ == '__main__':
    main()