import sys
input = sys.stdin.readline

N=int(input())

mod=998244353

U=[]
F=[]
W=[]
P=[]

for i in range(N):
    x,y=input().split()
    y=int(y)

    if x=="U":
        U.append(y)
    elif x=="F":
        F.append(y)
    elif x=="W":
        W.append(y)
    else:
        P.append(y)
        
c=(N-2)*pow(N-1,mod-2,mod)%mod

ux=0
for a in U:
    ux+=1-pow(c,a,mod)
    ux%=mod

fx=0
for a in F:
    fx+=1-pow(c,a,mod)
    fx%=mod

wx=0
for a in W:
    wx+=1-pow(c,a,mod)
    wx%=mod

SUM=sum(U)+sum(F)+sum(W)+sum(P)

ANS2=ux*fx*wx*pow(N-1,SUM,mod)%mod

print(ANS2*len(P)%mod)