#include <bits/stdc++.h>
#include <atcoder/all>
#include <boost/polygon/point_data.hpp>
#include <boost/polygon/voronoi.hpp>
#define rep(i,a,b) for(int i=(a);i<(b);i++)
#define rrep(i,a,b) for(int i=(b)-1;i>=(a);i--)
#define all(x) begin(x),end(x)
#define sz(x) (int)(x).size()
using namespace std;
using namespace atcoder;
using ll=long long;
using ld=long double;
using vll=vector<ll>;
using vvll=vector<vll>;
using vi=vector<int>;
using vvi=vector<vi>;
using pll=pair<ll,ll>;
using pi=pair<int,int>;

using mint=modint998244353;
// using mint=modint1000000007;
// using mint2=static_modint<2>;

// using BoostPoint=boost::polygon::point_data<int>;
// using Voronoi=boost::polygon::voronoi_diagram<double>;

int main()
{
  	ios::sync_with_stdio(false);
	cin.tie(nullptr);
	int N;
	cin>>N;
	int lim=1e5+1;
	vector<mint>q(lim);
	q[1]=mint(N-2)*mint(N-1).inv();
	rep(i,2,lim)q[i]=q[i-1]*q[1];
	mint U=0,F=0,W=0,P=0;
	ll T=0;
	rep(i,0,N){
		string S;
		int A;
		cin>>S>>A;
		T+=A;
		if(S=="U")U+=mint(1)-q[A];
		else if(S=="F")F+=mint(1)-q[A];
		else if(S=="W")W+=mint(1)-q[A];
		else P++;
	}
	cout<<(mint(N-1).pow(T)*U*F*W*P).val()<<'\n';
}