MOD = 998244353

def main():
    import sys
    input = sys.stdin.read().split()
    idx = 0
    N = int(input[idx])
    idx += 1
    
    U = []
    F = []
    W = []
    K_P = 0
    A_all = 0
    
    for _ in range(N):
        S = input[idx]
        A = int(input[idx+1])
        idx += 2
        A_all += A
        if S == 'U':
            U.append(A)
        elif S == 'F':
            F.append(A)
        elif S == 'W':
            W.append(A)
        elif S == 'P':
            K_P += 1
    
    if N == 1:
        print(0)
        return
    
    numerator = (N - 2) % MOD
    denominator = (N - 1) % MOD
    inv_denominator = pow(denominator, MOD - 2, MOD)
    x = (numerator * inv_denominator) % MOD
    
    U_sum = 0
    for a in U:
        term = (1 - pow(x, a, MOD)) % MOD
        U_sum = (U_sum + term) % MOD
    
    F_sum = 0
    for a in F:
        term = (1 - pow(x, a, MOD)) % MOD
        F_sum = (F_sum + term) % MOD
    
    W_sum = 0
    for a in W:
        term = (1 - pow(x, a, MOD)) % MOD
        W_sum = (W_sum + term) % MOD
    
    part = U_sum * F_sum % MOD
    part = part * W_sum % MOD
    part = part * K_P % MOD
    
    pow_term = pow(denominator, A_all, MOD)
    ans = part * pow_term % MOD
    print(ans)
    
if __name__ == "__main__":
    main()