#nullable enable

#region
var (_input, _iter) = (Array.Empty<string>(), 0);
T I<T>() where T : IParsable<T>
{
    while (_iter >= _input.Length) (_input, _iter) = (Console.ReadLine()!.Trim().Split(' '), 0);
    return T.Parse(_input[_iter++], null);
}
#endregion

static T[] Range<T>(int n, Func<T> F) => Enumerable.Range(0, n).Select(_ => F()).ToArray();

bool Solve(string s, string t)
{
    var a1 = new List<int>();
    var a2 = new List<int>();
    var ca = new int[3];
    for (var lp = -1; lp <= 1; lp += 2)
    {
        foreach (var c in s)
        {
            var j = 1;
            if (c == 'd') j = 0;
            else if (c == 'g') j = 2;
            a1.Add(j);
            ca[j] += lp;
        }
        (a1, a2, s, t) = (a2, a1, t, s);
    }
    if (ca.Max() != 0 || ca.Min() != 0) return false;
    for (var lp = 0; lp < 2; lp++)
    {
        var rle = a1.RunLengthEncoding();
        if (rle.Count == 3)
        {
            var cz = rle.Select(e => e.Item1).ToArray();
            if (cz[0] == 2 && cz[1] == 1 && cz[2] == 0 && rle[1].Item2 >= 3) return false;
        }
        (a1, a2) = (a2, a1);
    }
    return true;
}

var ans = Range(I<int>(), () => Solve(I<string>(), I<string>()) ? "Yes" : "No");
Console.WriteLine(string.Join(Environment.NewLine, ans));

static class StringUtilities
{
    public static List<(T, int)> RunLengthEncoding<T>(this IEnumerable<T> s) where T : IEquatable<T>
    {
        var res = new List<(T, int)>();
        if (!s.Any()) return res;
        var (pc, pl) = (s.First(), 1);
        foreach (var c in s.Skip(1))
        {
            if (!c.Equals(pc))
            {
                res.Add((pc, pl));
                (pc, pl) = (c, 0);
            }
            pl++;
        }
        res.Add((pc, pl));
        return res;
    }

}