//#pragma GCC optimize("Ofast")
//#pragma GCC target("avx")
//#undef LOCAL




#include <algorithm>

#include <array>

#include <bitset>

#include <cassert>

#include <complex>

#include <cstdio>

#include <cstring>

#include <iostream>

#include <map>

#include <numeric>

#include <queue>

#include <set>

#include <string>

#include <unordered_map>

#include <unordered_set>

#include <vector>

using namespace std;

using uint = unsigned int;
using ll = long long;
using ull = unsigned long long;
constexpr ll TEN(int n) { return (n == 0) ? 1 : 10 * TEN(n - 1); }
template <class T> using V = vector<T>;
template <class T> using VV = V<V<T>>;


template <uint MD> struct ModInt {
    using M = ModInt;
    static constexpr uint get_mod() { return MD; }
    const static M G;
    uint v;
    ModInt(ll _v = 0) { set_v(uint(_v % MD + MD)); }
    M& set_v(uint _v) {
        v = (_v < MD) ? _v : _v - MD;
        return *this;
    }
    explicit operator bool() const { return v != 0; }
    M operator-() const { return M() - *this; }
    M operator+(const M& r) const { return M().set_v(v + r.v); }
    M operator-(const M& r) const { return M().set_v(v + MD - r.v); }
    M operator*(const M& r) const { return M().set_v(uint(ull(v) * r.v % MD)); }
    M operator/(const M& r) const { return *this * r.inv(); }
    M& operator+=(const M& r) { return *this = *this + r; }
    M& operator-=(const M& r) { return *this = *this - r; }
    M& operator*=(const M& r) { return *this = *this * r; }
    M& operator/=(const M& r) { return *this = *this / r; }
    bool operator==(const M& r) const { return v == r.v; }
    M pow(ll n) const {
        M x = *this, r = 1;
        while (n) {
            if (n & 1) r *= x;
            x *= x;
            n >>= 1;
        }
        return r;
    }
    M inv() const { return pow(MD - 2); }
    friend ostream& operator<<(ostream& os, const M& r) { return os << r.v; }
};
// using Mint = ModInt<998244353>;
// template<> const Mint Mint::G = Mint(3);



#include <unistd.h>

struct Scanner {
    int fd = -1;
    char line[(1 << 15) + 1];
    size_t st = 0, ed = 0;
    void reread() {
        memmove(line, line + st, ed - st);
        ed -= st;
        st = 0;
        ed += ::read(fd, line + ed, (1 << 15) - ed);
        line[ed] = '\0';
    }
    bool succ() {
        while (true) {
            if (st == ed) {
                reread();
                if (st == ed) return false;
            }
            while (st != ed && isspace(line[st])) st++;
            if (st != ed) break;
        }
        if (ed - st <= 50) {
            bool sep = false;
            for (size_t i = st; i < ed; i++) {
                if (isspace(line[i])) {
                    sep = true;
                    break;
                }
            }
            if (!sep) reread();
        }
        return true;
    }
    template <class T, enable_if_t<is_same<T, string>::value, int> = 0>
    bool read_single(T& ref) {
        if (!succ()) return false;
        while (true) {
            size_t sz = 0;
            while (st + sz < ed && !isspace(line[st + sz])) sz++;
            ref.append(line + st, sz);
            st += sz;
            if (!sz || st != ed) break;
            reread();
        }
        return true;
    }
    template <class T, enable_if_t<is_integral<T>::value, int> = 0>
    bool read_single(T& ref) {
        if (!succ()) return false;
        bool neg = false;
        if (line[st] == '-') {
            neg = true;
            st++;
        }
        ref = T(0);
        while (isdigit(line[st])) {
            ref = 10 * ref + (line[st++] & 0xf);
        }
        if (neg) ref = -ref;
        return true;
    }
    template <class T> bool read_single(V<T>& ref) {
        for (auto& d : ref) {
            if (!read_single(d)) return false;
        }
        return true;
    }
    void read() {}
    template <class H, class... T> void read(H& h, T&... t) {
        bool f = read_single(h);
        assert(f);
        read(t...);
    }
    Scanner(FILE* fp) : fd(fileno(fp)) {}
};

struct Printer {
  public:
    template <bool F = false> void write() {}
    template <bool F = false, class H, class... T>
    void write(const H& h, const T&... t) {
        if (F) write_single(' ');
        write_single(h);
        write<true>(t...);
    }
    template <class... T> void writeln(const T&... t) {
        write(t...);
        write_single('\n');
    }

    Printer(FILE* _fp) : fp(_fp) {}
    ~Printer() { flush(); }

  private:
    static constexpr size_t SIZE = 1 << 15;
    FILE* fp;
    char line[SIZE], small[50];
    size_t pos = 0;
    void flush() {
        fwrite(line, 1, pos, fp);
        pos = 0;
    }
    void write_single(const char& val) {
        if (pos == SIZE) flush();
        line[pos++] = val;
    }
    template <class T, enable_if_t<is_integral<T>::value, int> = 0>
    void write_single(T val) {
        if (pos > (1 << 15) - 50) flush();
        if (val == 0) {
            write_single('0');
            return;
        }
        if (val < 0) {
            write_single('-');
            val = -val; // todo min
        }
        size_t len = 0;
        while (val) {
            small[len++] = char(0x30 | (val % 10));
            val /= 10;
        }
        for (size_t i = 0; i < len; i++) {
            line[pos + i] = small[len - 1 - i];
        }
        pos += len;
    }
    void write_single(const string& s) {
        for (char c : s) write_single(c);
    }
    void write_single(const char* s) {
        size_t len = strlen(s);
        for (size_t i = 0; i < len; i++) write_single(s[i]);
    }
    template <class T> void write_single(const V<T>& val) {
        auto n = val.size();
        for (size_t i = 0; i < n; i++) {
            if (i) write_single(' ');
            write_single(val[i]);
        }
    }
};

using Mint = ModInt<998244353>;

Scanner sc = Scanner(stdin);
Printer pr = Printer(stdout);

int main() {
    string s;
    sc.read(s);
    int n = int(s.size());

    V<VV<Mint>> dp(n + 1, VV<Mint>(n + 1, V<Mint>(n + 1)));
    dp[0][0][0] = Mint(1);

    for (int l = 0; l < n; l++) {
        for (int o = 0; o <= l; o++) {
            for (int z = 0; o + z <= l; z++) {
                int u = (l - (o + z));
                char c = s[n - 1 - u];

                dp[l + 1][o][z] += dp[l][o][z];
                if (c == '0') {
                    dp[l + 1][o + 1][z] += dp[l][o][z];
                } else {
                    dp[l + 1][o][z + 1] += dp[l][o][z];
                }
            }
        }
    }

    V<int> osm(n + 1), zsm(n + 1);
    for (int i = 0; i < n; i++) {
        osm[i + 1] = osm[i];
        zsm[i + 1] = zsm[i];
        if (s[i] == '0') {
            zsm[i + 1]++;
        } else {
            osm[i + 1]++;
        }
    }

    V<VV<int>> ok(n + 1, VV<int>(n + 1, V<int>(n + 1)));
    ok[0][0][0] = 1;
    for (int k = 0; k <= n; k++) {
        for (int o = 0; o <= osm[k]; o++) {
            for (int z = 0; z <= zsm[k]; z++) {
                if (!ok[k][o][z]) continue;

                // a - a
                if (o < osm[k]) {
                    ok[k][o + 1][z] = 1;
                }
                if (z < zsm[k]) {
                    ok[k][o][z + 1] = 1;
                }

                // a - top
                if (k + 1 <= n) {
                    if (o < osm[k + 1]) {
                        ok[k + 1][o + 1][z] = 1;
                    }
                    if (z < zsm[k + 1]) {
                        ok[k + 1][o][z + 1] = 1;
                    }
                }

                // top - top
                if (k + 2 <= n) {
                    if (s[k] == '0' || s[k + 1] == '0') {
                        ok[k + 2][o][z + 1] = 1;
                    }
                    if (s[k] == '1' || s[k + 1] == '1') {
                        ok[k + 2][o + 1][z] = 1;
                    }
                }
            }
        }
    }

    Mint ans = 0;
    for (int l = n; l >= 1; l--) {
        for (int o = 0; o <= l; o++) {
            for (int z = 0; o + z <= l; z++) {
                int u = (l - (o + z));
                int pre = n - u;
                if (osm[pre] < o || zsm[pre] < z) continue;

                int rem_o = osm[pre] - o;
                int rem_z = zsm[pre] - z;

                if (!ok[pre][rem_o][rem_z]) continue;

                if (dp[l][o][z].v) {
//                    dbg(l, o, z, dp[l][o][z]);
                    ans += dp[l][o][z];
                }
            }
        }
    }

    pr.writeln(ans.v);
    return 0;
}


Measured memory_bytes: 223048