#include<bits/stdc++.h> 
using namespace std;
typedef long long ll;
template<typename T1,typename T2> bool chmin(T1 &a,T2 b){if(a<=b)return 0; a=b; return 1;}
template<typename T1,typename T2> bool chmax(T1 &a,T2 b){if(a>=b)return 0; a=b; return 1;}
int dx[4]={0,1,-1,0};
int dy[4]={1,0,0,-1};
long double eps = 1e-6;
long double pi = acos(-1);

template< int mod = 1000000007 >
struct ModInt {
    int x;
    ModInt() : x(0) {}
    ModInt(int64_t y) : x(y >= 0 ? y % mod : (mod - (-y) % mod) % mod) {}
    ModInt &operator+=(const ModInt &p) {
        if((x += p.x) >= mod) x -= mod;
        return *this;
    }
    ModInt &operator-=(const ModInt &p) {
        if((x += mod - p.x) >= mod) x -= mod;
        return *this;
    }
    ModInt &operator*=(const ModInt &p) {
        x = (int) (1LL * x * p.x % mod);
        return *this;
    }
    ModInt &operator/=(const ModInt &p) {
        *this *= p.inverse();
        return *this;
    }

    ModInt operator-() const { return ModInt(-x); }
    ModInt operator+(const ModInt &p) const { return ModInt(*this) += p; }
    ModInt operator-(const ModInt &p) const { return ModInt(*this) -= p; }
    ModInt operator*(const ModInt &p) const { return ModInt(*this) *= p; }
    ModInt operator/(const ModInt &p) const { return ModInt(*this) /= p; }
    bool operator==(const ModInt &p) const { return x == p.x; }
    bool operator!=(const ModInt &p) const { return x != p.x; }

    ModInt inverse() const {
        int a = x, b = mod, u = 1, v = 0, t;
        while(b > 0) {
            t = a / b;
            swap(a -= t * b, b);
            swap(u -= t * v, v);
        }
        return ModInt(u);
    }

    ModInt pow(int64_t n) const {
        ModInt ret(1), mul(x);
        while(n > 0) {
            if(n & 1) ret *= mul;
            mul *= mul;
            n >>= 1;
        }
        return ret;
    }

    friend ostream &operator<<(ostream &os, const ModInt &p) {
        return os << p.x;
    }

    friend istream &operator>>(istream &is, ModInt &a) {
        int64_t t;
        is >> t;
        a = ModInt< mod >(t);
        return (is);
    }

    static int get_mod() { return mod; }
};

// const int mod = 1000000007;
const int mod = 998244353;
using mint = ModInt< mod >;

signed main(){
    ios::sync_with_stdio(false);
    cin.tie(0);
    cout << fixed << setprecision(20);

    string s;
    int k;
    cin>>s>>k;
    int n = s.size();
    int sum[n+1]={};
    int z = 0;
    int o = 0;
    for(int i=0;i<n;i++){
        if(s[i] == '0'){
            z++;
            sum[z+1] = sum[z];
        }
        else o++;
        sum[z+1] += + (s[i] == '1');
    }
    
    mint dp[z+2][n][n+1]={};
    dp[0][0][0] = 1;
    for(int i=0;i<z;i++){
        for(int y=0;y<=min(k,o);y++){
            for(int j=sum[i];j<=min(o,sum[i]+k);j++){
                for(int p=max(j,sum[i+1]);p<=min(sum[i+1]+k,o);p++){
                    int cnt = y;
                    int dif = p - j;
                    dif -= sum[i+1] - sum[i];
                    dif = max(0,dif);
                    cnt += dif;
                    if(cnt <= k){
                        dp[i+1][p][cnt] += dp[i][j][y];
                    }
                }
            }
        }
    }
    mint ans = 0;
    for(int i=sum[z];i<=o;i++){
        for(int y=0;y<=min(o,k);y++){
            ans += dp[z][i][y];
        }
    }
    cout << ans << endl;

    
}


Measured memory_bytes: 108960