#include <iostream>
#include <algorithm>
#include <utility>
#include <string>
#include <vector>
#include <set>
#include <stack>
#include <queue>
#include <map>
#include <math.h>
#include <string.h>
#include <iomanip>
#include <numeric>
#include <cstdlib>
#include <cstdint>
#include <cmath>
#include <functional>
#include <limits>
#include <cassert>
#include <bitset>

using namespace std;

/* template */

using ll = long long;

void debug_out() { std::cout << std::endl; }
 
template <typename Head, typename... Tail>
void debug_out(Head H, Tail... T) {
  cout << H << " ";
  debug_out(T...);
}

#ifdef LOCAL
#define debug(...) cout << "debug: "; debug_out(__VA_ARGS__)
#else
#define debug(...) 
#endif

#define rep(i, a, n) for (int i = (int)(a); i < (int)(n); i++)
#define rrep(i, a, n) for (int i = ((int)(n-1)); i >= (int)(a); i--)
#define Rep(i, a, n) for (long long i = (long long)(a); i< (long long)(n); i++)
#define RRep(i, a, n) for (long long i = ((long long)(n-1ll)); i>=(long long)(a); i--)
#define all(v) (v).begin(),(v).end()
#define rall(v) (v).rbegin(),(v).rend()

template <typename T>
std::ostream& operator<<(std::ostream& os, std::vector<T> vec) {
  for (std::size_t i = 0; i < vec.size(); i++)os << vec[i] << (i + 1 == vec.size() ? "" : " ");
  return os;
}

struct Edge{
    int to;
    ll weight;
    Edge(int t, ll w) : to(t), weight(w){ }
};

struct edge{
    int from;
    int to;
    ll weight;
    edge(int f,int t,ll w) : from(f), to(t), weight(w){ }
};


using Graph = vector<vector<Edge>>;
using graph = vector<vector<int>>;
using edges = vector<edge>;

template <class T>
inline bool chmin(T &a, T b){
    if (a > b){
        a = b;
        return true;
    }
    return false;
}

template <class T>
inline bool chmax(T &a, T b){
    if (a < b){
        a = b;
        return true;
    }
    return false;
}

template <class T>
T lcm(T a, T b){
    return (a*b)/gcd(a,b);
}

bool isPalindrome(string s){
    string t = s;
    reverse(all(t));
    return s==t;
}

constexpr ll LNF = __LONG_LONG_MAX__;

constexpr int INF = 1e9+7;

const double PI=3.14159265358979323846;


vector<int> dx = {-1,0,1,0,-1,1,-1,1};
vector<int> dy = {0,-1,0,1,1,-1,-1,1};

/* template */

int main(){
    cin.tie(nullptr);
    ios::sync_with_stdio(false);
    string s; int x,y; cin >> s >> x >> y;
    vector<vector<int>> p(2);
    int n = s.size();
    int flag = 0;
    p[0].emplace_back(0);
    rep(i,0,n){
        if(s[i]=='T'){
            if(p[flag][p[flag].size()-1]==0) p[flag].pop_back();
            flag = 1-flag;
            p[flag].emplace_back(0);
            continue;
        }
        p[flag][p[flag].size()-1]++;
    }
    int px = p[0].size();
    int py = p[1].size();
    vector<bitset<20000>> sx(px+1,bitset<20000>(0)),sy(py+1,bitset<20000>(0));
    int m = 10000;
    sx[0][m] = 1;
    sy[0][m] = 1;
    rep(i,0,px){
        if(i==0 && s[0]=='F'){
            sx[i+1] = (sx[i]<<p[0][i]);
            continue;
        }
        sx[i+1] = (sx[i]<<p[0][i]) | (sx[i]>>p[0][i]);
    }
    rep(i,0,py){
        sy[i+1] = (sy[i]<<p[1][i]) | (sy[i]>>p[1][i]);
    }
    debug(sx[px][m+x],sy[py][m+y]);
    if(sx[px][m+x]==1 && sy[py][m+y]==1){
        cout << "Yes" << endl;
    }
    else{
        cout << "No" << endl;
    }
} 

Measured memory_bytes: 10112