use proconio::input;

fn main() {
    input! {
        n:usize,
        a:[usize;n],
        b:[String;n],
    }
    let mut dp = vec![vec![vec![vec![vec![ModInt::<MOD>::new(0); 2]; 34]; 5]; 10]; n + 1];
    dp[0][0][0][0][0] = ModInt::new(1);
    for i in 0..n {
        for j in 0..10 {
            for u in 0..5 {
                for d in 0..34 {
                    for k in 0..2 {
                        dp[i + 1][j][u][d][k] = dp[i + 1][j][u][d][k] + dp[i][j][u][d][k];

                        if j >= 9 {
                            continue;
                        }
                        if b[i].parse::<usize>().is_ok() {
                            let di = b[i].parse::<usize>().unwrap();

                            if u + a[i] > 4 || d + di > 33 {
                                continue;
                            }

                            dp[i + 1][j + 1][u + a[i]][d + di][k] =
                                dp[i + 1][j + 1][u + a[i]][d + di][k] + dp[i][j][u][d][k];
                        }

                        if b[i].starts_with('X') && k == 0 {
                            if u + a[i] > 4 {
                                continue;
                            }

                            dp[i + 1][j + 1][u + a[i]][d][1] =
                                dp[i + 1][j + 1][u + a[i]][d][1] + dp[i][j][u][d][k];
                        }
                    }
                }
            }
        }
    }

    let ans = dp[n][9][4][33][1];
    println!("{}", ans);
}

const MOD: usize = 998244353;
use modint::*;
mod modint {
    use std::fmt;
    use std::ops;

    #[derive(Copy, Clone, PartialEq, Eq)]
    pub struct ModInt<const MOD: usize> {
        pub val: usize,
    }

    impl<const MOD: usize> ModInt<MOD> {
        pub fn new(val: usize) -> Self {
            Self { val: val % MOD }
        }

        pub fn pow(mut self, mut e: usize) -> Self {
            let mut res = Self::new(1);
            while 0 < e {
                if e & 1 != 0 {
                    res *= self;
                }

                self *= self;
                e >>= 1;
            }

            res
        }
    }

    impl<const MOD: usize> From<usize> for ModInt<MOD> {
        fn from(value: usize) -> Self {
            Self { val: value % MOD }
        }
    }

    impl<const MOD: usize> fmt::Display for ModInt<MOD> {
        fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
            write!(f, "{}", self.val)
        }
    }

    impl<const MOD: usize> fmt::Debug for ModInt<MOD> {
        fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
            write!(f, "{}", self.val)
        }
    }

    impl<const MOD: usize> ops::Neg for ModInt<MOD> {
        type Output = Self;

        fn neg(self) -> Self::Output {
            Self {
                val: (MOD - self.val) % MOD,
            }
        }
    }

    impl<const MOD: usize> ops::Add for ModInt<MOD> {
        type Output = Self;

        fn add(self, rhs: Self) -> Self::Output {
            Self {
                val: (self.val + rhs.val) % MOD,
            }
        }
    }

    impl<const MOD: usize> ops::AddAssign for ModInt<MOD> {
        fn add_assign(&mut self, rhs: Self) {
            *self = *self + rhs;
        }
    }

    impl<const MOD: usize> ops::Mul for ModInt<MOD> {
        type Output = Self;

        fn mul(self, rhs: Self) -> Self::Output {
            Self {
                val: self.val * rhs.val % MOD,
            }
        }
    }

    impl<const MOD: usize> ops::MulAssign for ModInt<MOD> {
        fn mul_assign(&mut self, rhs: Self) {
            *self = *self * rhs;
        }
    }

    impl<const MOD: usize> ops::Sub for ModInt<MOD> {
        type Output = Self;

        fn sub(mut self, rhs: Self) -> Self::Output {
            if self.val < rhs.val {
                self.val += MOD;
            }

            Self {
                val: (self.val - rhs.val) % MOD,
            }
        }
    }

    impl<const MOD: usize> ops::SubAssign for ModInt<MOD> {
        fn sub_assign(&mut self, rhs: Self) {
            if self.val < rhs.val {
                self.val += MOD;
            }

            *self = *self - rhs;
        }
    }

    impl<const MOD: usize> ops::Div for ModInt<MOD> {
        type Output = Self;

        fn div(self, rhs: Self) -> Self {
            assert!(rhs.val != 0);
            self * rhs.pow(MOD - 2)
        }
    }

    impl<const MOD: usize> ops::DivAssign for ModInt<MOD> {
        fn div_assign(&mut self, rhs: Self) {
            *self = *self / rhs
        }
    }
}