import bisect
from collections import defaultdict
import sys
sys.setrecursionlimit(10 ** 7)
mod = 998244353
S = input()
N = len(S)
K = int(input())

next = [-1] * N
stack = []
for i, s in enumerate(S):
    if s == "(":
        stack.append(i)
    elif s == ",":
        next[stack[-1]] = i
    elif s == ")":
        stack.pop()


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
    oper = []
    if S[L] == "?" or S[L] == "a":
        oper.append(max)
    if S[L] == "?" or S[L] == "e":
        oper.append(mex)
    L += 2

    M = next[L]
    A = rec(L+1, M)
    B = rec(M+1, R)
    res = [0, 0, 0]
    for op in oper:
        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)