MOD = 998244353
N = int(input())
ls = [0, 0, 0, 0]
S = "UFWP"
suma = 0
C = ((N - 2) * pow(N - 1, -1, MOD)) % MOD
cnt = 0
for i in range(N):
    s, a = input().split(' ')
    a = int(a)
    ls[S.find(s)] += (1 - pow(C, a))
    ls[S.find(s)] %= MOD
    suma += a
    if s == 'P':
        cnt += 1

ans = (ls[0] * ls[1] * ls[2] * cnt * pow(N - 1, suma, MOD)) % MOD
print(ans)