//08:09~
#include <bits/stdc++.h>
using namespace std;

template <uint32_t mod>
class modint{
    uint64_t value;
public:
    constexpr modint(const int64_t x=0) noexcept: value(x % mod + (x < 0 ? mod : 0)){ }
    constexpr explicit operator uint64_t() const noexcept{ return value; }
    constexpr modint inverse() const noexcept{ return pow(*this, mod-2); }
    constexpr bool operator==(const modint &rhs) const noexcept{ return value == rhs.value; }
    constexpr bool operator!=(const modint &rhs) const noexcept{ return value != rhs.value; }
    constexpr modint operator+() const noexcept{ return modint(*this); }
    constexpr modint operator-() const noexcept{ return modint(mod - value); }
    constexpr modint operator+(const modint &rhs) const noexcept{ return modint(*this) += rhs; }
    constexpr modint operator-(const modint &rhs) const noexcept{ return modint(*this) -= rhs; }
    constexpr modint operator*(const modint &rhs) const noexcept{ return modint(*this) *= rhs; }
    constexpr modint operator/(const modint &rhs) const noexcept{ return modint(*this) /= rhs; }
    constexpr modint &operator+=(const modint &rhs) noexcept{
        if((value += rhs.value) >= mod) value -= mod;
        return *this;
    }
    constexpr modint &operator-=(const modint &rhs) noexcept{ return *this += mod - rhs.value; }
    constexpr modint &operator*=(const modint &rhs) noexcept{
        if((value *= rhs.value) >= mod) value %= mod;
        return *this;
    }
    constexpr modint &operator/=(const modint &rhs) noexcept{ return *this *= rhs.inverse(); }
    constexpr modint operator++(int) noexcept{
        modint ret(*this);
        if((++value) >= mod) value -= mod;
        return ret;
    }
    constexpr modint operator--(int) noexcept{
        modint ret(*this);
        if((value += mod - 1) >= mod) value -= mod;
        return ret;
    }
    constexpr modint &operator++() noexcept{ return *this += 1; }
    constexpr modint &operator--() noexcept{ return *this -= 1; }
    friend std::ostream &operator<<(std::ostream &os, const modint<mod> &x){ return os << x.value; }
    friend std::istream &operator>>(std::istream &is, modint<mod> &x){
        int64_t i;
        is >> i;
        x = modint<mod>(i);
        return is;
    }
    friend constexpr modint<mod> pow(const modint<mod> &x, uint64_t y){
        modint<mod> ret{1}, m{x};
        while(y > 0){
            if(y & 1) ret *= m;
            m *= m;
            y >>= 1;
        }
        return ret;
    }
};
constexpr int64_t mod = 998244353;

int main(){
    cin.tie(nullptr);
    ios::sync_with_stdio(false);

    int n;
    string s;
    static int color[300000];
    cin >> n >> s;
    for(int i=0;i<3*n;++i) color[i] = 1 << (s[i] % 3);

    static int64_t dp[8];
    modint<mod> ans = 1;
    for(int i=0;i<3*n;++i){
        if(dp[7 & ~color[i]] > 0) ans *= dp[7 & ~color[i]]--;
        else if(dp[1] > 0 && color[i] != 1){ ans *= dp[1]--; dp[1 | color[i]]++; }
        else if(dp[2] > 0 && color[i] != 2){ ans *= dp[2]--; dp[2 | color[i]]++; }
        else if(dp[4] > 0 && color[i] != 4){ ans *= dp[4]--; dp[4 | color[i]]++; }
        else dp[color[i]]++;
    }
    for(int i=1;i<=n;++i) ans *= i;
    cout << ans << endl;

    return 0;
}

Measured memory_bytes: 1812