MOD = 998244353

S = input()
S = S.replace("max", "a")
S = S.replace("mex", "e")
S = S.replace("m?x", "o")
S = S.replace(",", "")
S = S.replace("(", "")
S = S.replace(")", "")
S = S[::-1]

def mex(i, j):
    se = {i, j}
    x = 0
    while x in se:
        x += 1
    return x

stack = []
for s in S:
    if s == "2":
        stack.append([0, 0, 1])
    elif s == "1":
        stack.append([0, 1, 0])
    elif s == "0":
        stack.append([1, 0, 0])
    elif s == "?":
        stack.append([1, 1, 1])
    elif s == "a":
        A = stack.pop()
        B = stack.pop()
        tmp = [0] * 3
        for i in range(3):
            for j in range(3):
                tmp[max(i, j)] += A[i] * B[j]
                tmp[max(i, j)] %= MOD
        stack.append(tmp)
    elif s == "e":
        A = stack.pop()
        B = stack.pop()
        tmp = [0] * 3
        for i in range(3):
            for j in range(3):
                tmp[mex(i, j)] += A[i] * B[j]
                tmp[mex(i, j)] %= MOD
        stack.append(tmp)
    else:
        A = stack.pop()
        B = stack.pop()
        tmp = [0] * 3
        for i in range(3):
            for j in range(3):
                tmp[max(i, j)] += A[i] * B[j]
                tmp[max(i, j)] %= MOD
                tmp[mex(i, j)] += A[i] * B[j]
                tmp[mex(i, j)] %= MOD
        stack.append(tmp)
    

k = int(input())
print(stack[0][k])