mod = 998244353
S = input()
N = len(S)
K = int(input())

if N == 1:
    if S == "?" or S == str(K):
        print(1)
    else:
        print(0)
    exit()


def mex(a, b):
    for i in range(3):
        if not i in [a, b]:
            return i


def rec(L, R):
    if L + 1 >= R:
        if S[L] == "?":
            return [1, 1, 1]
        res = [0, 0, 0]
        res[int(S[L])] += 1
        return res

    R -= 1
    L += 1
    operand = []
    if S[L] == "?" or S[L] == "a":
        operand.append(max)
    if S[L] == "?" or S[L] == "e":
        operand.append(mex)
    L += 3

    br = 0
    for i in range(L, R):
        if S[i] == "(":
            br += 1
        elif S[i] == ")":
            br -= 1
        elif S[i] == "," and br == 0:
            M = i
            break

    A = rec(L, M)
    B = rec(M+1, R)
    res = [0, 0, 0]
    for op in operand:
        for i, a in enumerate(A):
            for j, b in enumerate(B):
                idx = op(i, j)
                res[idx] += a * b % mod
                res[idx] %= mod
    return res


ans = rec(0, N)[K]
print(ans)