def f(x):
    if x=="?":
        return -1
    else:
        return int(x)

N=int(input())
S=["*"]+list(map(f,input()))

Ans=0
Y=[0,0,0]
Mod=998244353
for i in range(1,N+1):
    X=Y.copy()
    Y=[0,0,0]
    if S[i]==-1:
        for c in range(10):
            Y[c%3]+=1
            for d in [0,1,2]:
                Y[(d+c)%3]+=X[d]
    else:
        Y[S[i]%3]+=1
        for d in [0,1,2]:
            Y[(d+S[i])%3]+=X[d]

    Y=[Y[0]%Mod, Y[1]%Mod, Y[2]%Mod]
    Ans+=Y[0]

print(Ans%Mod)