using Yorukatsu050.Questions;
using Yorukatsu050.Extensions;
using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Text;

namespace Yorukatsu050.Questions
{
    /// <summary>
    /// https://atcoder.jp/contests/abc082/tasks/arc087_b
    /// </summary>
    public class QuestionE : AtCoderQuestionBase
    {
        public override IEnumerable<object> Solve(TextReader inputStream)
        {
            var s = inputStream.ReadLine();
            var xy = inputStream.ReadIntArray();
            var x = xy[0];
            var y = xy[1];

            List<int> xOrders, yOrders;
            Decode(s, out xOrders, out yOrders);

            var initialX = s.TakeWhile(c => c == 'F').Count();
            if (CheckReachable(initialX, x, xOrders) && CheckReachable(0, y, yOrders))
            {
                yield return "Yes";
            }
            else
            {
                yield return "No";
            }
        }

        private static void Decode(string s, out List<int> xOrders, out List<int> yOrders)
        {
            xOrders = new List<int>();
            yOrders = new List<int>();
            var currentDirection = Direction.X;
            var currentDistance = 0;
            foreach (var c in s.SkipWhile(c => c == 'F'))
            {
                if (c == 'T')
                {
                    currentDirection = AddOrderAndTurn(xOrders, yOrders, currentDirection, currentDistance);
                    currentDistance = 0;
                }
                else
                {
                    currentDistance++;
                }
            }
            AddOrderAndTurn(xOrders, yOrders, currentDirection, currentDistance);
        }

        private static Direction AddOrderAndTurn(List<int> xOrders, List<int> yOrders, Direction currentDirection, int currentDistance)
        {
            switch (currentDirection)
            {
                case Direction.X:
                    xOrders.Add(currentDistance);
                    currentDirection = Direction.Y;
                    break;
                case Direction.Y:
                    yOrders.Add(currentDistance);
                    currentDirection = Direction.X;
                    break;
            }

            return currentDirection;
        }

        bool CheckReachable(int start, int goal, IList<int> orders)
        {
            const int loop = 20000;
            var reachable = new bool[orders.Count + 1, loop];
            reachable[0, start] = true;

            for (int orderIndex = 0; orderIndex < orders.Count; orderIndex++)
            {
                for (int coordinate = 0; coordinate < reachable.GetLength(1); coordinate++)
                {
                    if (reachable[orderIndex, coordinate])
                    {
                        var order = orders[orderIndex];
                        reachable[orderIndex + 1, (coordinate + order) % loop] = true;
                        reachable[orderIndex + 1, (coordinate - order + loop) % loop] = true;
                    }
                }
            }

            return reachable[orders.Count, (goal + loop) % loop];
        }

        enum Direction
        {
            X,
            Y
        }
    }
}


namespace Yorukatsu050
{
    class Program
    {
        static void Main(string[] args)
        {
            IAtCoderQuestion question = new QuestionE();    // 問題に合わせて書き換え
            var answers = question.Solve(Console.In);
            foreach (var answer in answers)
            {
                Console.WriteLine(answer);
            }
        }
    }
}

#region Base Classes

namespace Yorukatsu050.Questions
{

    public interface IAtCoderQuestion
    {
        IEnumerable<object> Solve(string input);
        IEnumerable<object> Solve(TextReader inputStream);
    }

    public abstract class AtCoderQuestionBase : IAtCoderQuestion
    {
        public IEnumerable<object> Solve(string input)
        {
            var stream = new MemoryStream(Encoding.Unicode.GetBytes(input));
            var reader = new StreamReader(stream, Encoding.Unicode);

            return Solve(reader);
        }

        public abstract IEnumerable<object> Solve(TextReader inputStream);
    }

}

#endregion

#region Extensions

namespace Yorukatsu050.Extensions
{
    internal static class TextReaderExtensions
    {
        internal static int ReadInt(this TextReader reader) => int.Parse(ReadString(reader));
        internal static long ReadLong(this TextReader reader) => long.Parse(ReadString(reader));
        internal static double ReadDouble(this TextReader reader) => double.Parse(ReadString(reader));
        internal static string ReadString(this TextReader reader) => reader.ReadLine();

        internal static int[] ReadIntArray(this TextReader reader, char separator = ' ') => ReadStringArray(reader, separator).Select(int.Parse).ToArray();
        internal static long[] ReadLongArray(this TextReader reader, char separator = ' ') => ReadStringArray(reader, separator).Select(long.Parse).ToArray();
        internal static double[] ReadDoubleArray(this TextReader reader, char separator = ' ') => ReadStringArray(reader, separator).Select(double.Parse).ToArray();
        internal static string[] ReadStringArray(this TextReader reader, char separator = ' ') => reader.ReadLine().Split(separator);
    }
}

#endregion

Measured memory_bytes: 161112