namespace AtCoder;

#nullable enable

using System.Numerics;

static class Extensions
{
    public static T[] Repeat<T>(this int time, Func<T> F) => Enumerable.Range(0, time).Select(_ => F()).ToArray();

}

class AtCoder
{
    const int Mod = 998244353;
    object? Solve()
    {
        var s = String().AsSpan();
        var t = String().AsSpan();
        var sl = s.Length;
        var tl = t.Length;
        var dp = new long[tl + 1].AsSpan();
        dp[0] = 1;
        for (var i = 0; i < sl; i++)
        {
            var ep = dp.ToArray().AsSpan();
            var sc = s[i];
            for (var j = 0; j < tl; j++)
            {
                if (sc == t[j]) ep[j + 1] += dp[j];
            }
            for (var j = 0; j <= tl; j++) ep[j] %= Mod;
            dp = ep;
            GC.Collect();
        }
        var ans = dp[tl];
        for (var i = 0; i < sl - tl; i++) ans = ans * 2 % Mod;
        return ans;
    }

    public static void Main() => new AtCoder().Run();
    public void Run()
    {
        var res = Solve();
        if (res != null)
        {
            if (res is bool yes) res = yes ? "Yes" : "No";
            sw.WriteLine(res);
        }
        sw.Flush();
    }

    string[] input = Array.Empty<string>();
    int iter = 0;
    readonly StreamWriter sw = new(Console.OpenStandardOutput()) { AutoFlush = false };

    string String()
    {
        while (iter >= input.Length) (input, iter) = (Console.ReadLine()!.Trim().Split(' '), 0);
        return input[iter++];
    }
    T Input<T>() where T : IParsable<T> => T.Parse(String(), null);
    int Int() => Input<int>();
    void Out(object? x, string? separator = null)
    {
        separator ??= Environment.NewLine;
        if (x is System.Collections.IEnumerable obj and not string)
        {
            var firstLine = true;
            foreach (var item in obj)
            {
                if (!firstLine) sw.Write(separator);
                firstLine = false;
                sw.Write(item);
            }
        }
        else sw.Write(x);
        sw.WriteLine();
    }
}