import sys
input = sys.stdin.readline

N = int(input())
T = input()[:-1]
L = []
MOD = 998244353

for _ in range(N):
    I = list(input().split())
    
    if len(I)==1:
        S = I[0]
        x = min(len(S), len(T)-1)
        
        if x>0:
            L.append((S.count(T), S[:x], S[-x:]))
        else:
            L.append((S.count(T), '', ''))
    else:
        i, j = int(I[1])-1, int(I[2])-1
        c = (L[i][0]+L[j][0]+(''.join([L[i][2], L[j][1]]).count(T)))%MOD
        L.append((c, L[i][1], L[j][2]))

print(L[-1][0])