#include <iostream>
#include <vector>
#include <string>

template <int MOD>
struct ModInt {
    using lint = long long;
    int val;

    // constructor
    ModInt(lint v = 0) : val(v % MOD) {
        if (val < 0) val += MOD;
    };

    // unary operator
    ModInt operator+() const { return ModInt(val); }
    ModInt operator-() const { return ModInt(MOD - val); }
    ModInt inv() const { return this->pow(MOD - 2); }

    // arithmetic
    ModInt operator+(const ModInt& x) const { return ModInt(*this) += x; }
    ModInt operator-(const ModInt& x) const { return ModInt(*this) -= x; }
    ModInt operator*(const ModInt& x) const { return ModInt(*this) *= x; }
    ModInt operator/(const ModInt& x) const { return ModInt(*this) /= x; }
    ModInt pow(lint n) const {
        auto x = ModInt(1);
        auto b = *this;
        while (n > 0) {
            if (n & 1) x *= b;
            n >>= 1;
            b *= b;
        }
        return x;
    }

    // compound assignment
    ModInt& operator+=(const ModInt& x) {
        if ((val += x.val) >= MOD) val -= MOD;
        return *this;
    }
    ModInt& operator-=(const ModInt& x) {
        if ((val -= x.val) < 0) val += MOD;
        return *this;
    }
    ModInt& operator*=(const ModInt& x) {
        val = lint(val) * x.val % MOD;
        return *this;
    }
    ModInt& operator/=(const ModInt& x) { return *this *= x.inv(); }

    // compare
    bool operator==(const ModInt& b) const { return val == b.val; }
    bool operator!=(const ModInt& b) const { return val != b.val; }
    bool operator<(const ModInt& b) const { return val < b.val; }
    bool operator<=(const ModInt& b) const { return val <= b.val; }
    bool operator>(const ModInt& b) const { return val > b.val; }
    bool operator>=(const ModInt& b) const { return val >= b.val; }

    // I/O
    friend std::istream& operator>>(std::istream& is, ModInt& x) noexcept {
        lint v;
        is >> v;
        x = v;
        return is;
    }
    friend std::ostream& operator<<(std::ostream& os, const ModInt& x) noexcept { return os << x.val; }
};

template <class Container>
std::vector<int> zalgo(const Container& dat) {
    int n = dat.size();

    std::vector<int> ret(n);
    ret[0] = n;

    int i = 1, len = 0;
    while (i < n) {
        while (i + len < n && dat[len] == dat[i + len]) {
            ++len;
        }
        ret[i] = len;

        if (len == 0) {
            ++i;
            continue;
        }

        int nlen = 1;
        while (i + nlen < n && nlen + ret[nlen] < len) {
            ret[i + nlen] = ret[nlen];
            ++nlen;
        }

        i += nlen;
        len -= nlen;
    }

    return ret;
}

constexpr int MOD = 1000000007;
using mint = ModInt<MOD>;

void solve() {
    std::string s;
    std::cin >> s;
    int n = s.length();

    std::vector<mint> dp(n, 0);
    dp[0] = 1;

    mint ans = 0;
    for (int i = 0, j = n; i <= j; ++i, --j) {
        ans += dp[i];

        int m = j - i;
        auto zs = zalgo(s);
        for (int l = 1; i + l <= j - l; ++l) {
            if (zs[m - l] < l) continue;
            dp[i + l] += dp[i];
        }
        s.erase(s.begin());
        s.pop_back();
    }

    std::cout << ans << "\n";
}

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

    solve();

    return 0;
}