#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
#define int long long

#define all(X) (X).begin(), (X).end()
// #define reset(X) memset(X, 0, sizeof(X))
#define mp(a, b) make_pair(a, b)
#define pb push_back
#define endl '\n'
#define fi first
#define se second

using namespace __gnu_pbds;
using namespace std;
const int mod = 1e9 + 7;
// const int mod=998244353;
//const int mod=1e9+9;
//const int INF=4e18+10;
const int INF = 4e18 + 10;
template <typename T>
using ordered_set = tree<T, null_type, less<T>, rb_tree_tag, tree_order_statistics_node_update>;
template <typename T>
using ordered_multiset = tree<T, null_type, less_equal<T>, rb_tree_tag, tree_order_statistics_node_update>;

#define read(n) \
int n;      \
cin >> n;
#define readv(x, n)   \
vector<int> x(n); \
for (auto &i : x) \
    cin >> i;

typedef vector<int> vi;
typedef vector<vector<int>> vvi;
typedef pair<int, int> pii;

template <typename T1, typename T2>
void set_min(T1 &a, T2 b)
{
    a = min(a, (T1)b);
}

int multiply(int a, int b, int in_mod) { return (a * b) % in_mod; }
int mult_identity(int a) { return 1; }


auto power(auto a, int b, int in_mod)
{
    auto prod = mult_identity(a);
    auto mult = a % in_mod;
    while (b != 0)
    {
        if (b % 2)
        {
            prod = multiply(prod, mult, in_mod);
        }
        mult = multiply(mult, mult, in_mod);
        b /= 2;
    }
    return prod;
}
int mod_inv(int q, int in_mod)
{

    return power(q, in_mod - 2, in_mod);
}


int S(int x)
{
    int sm = 0;
    while(x)
    {
        sm+=x%10;
        x/=10;
    }
    return sm;
}
void solve()
{
    string s;
    cin>>s;
    int x, y;
    cin>>x>>y;

    int dx[4] = {1, 0, -1, 0};
    int dy[4] = {0, 1, 0, -1};

    int pos_x= 0,  pos_y=0;
    int val = 0;

    vector<int> path_lengths[2];
    int start = -1;
    int make_way = 0;
    s.pb('T');

    for(int i= 0;i<s.size();i++)
    {
        if(s[i] == 'T')
        {
            if( i -start-1)

                path_lengths[make_way].pb({i-start - 1});
            start = i;
            make_way= 1-make_way;
        }

    }

    //knapsack

    const int offset = 16000;

    bitset<2*offset> b;
    b[offset] = true;
    int cnt = 0;
    for(auto i:path_lengths[0])
    {
        if(i>0)
        {
            auto old_b = b;
            b = old_b<<i;
            if(cnt !=0 || s[0]!='F')
            b |= old_b>>i;
        }
        cnt++;
    }

    if(!b[offset + x])
    {
        cout<<"No"<<endl;
        return;
    }
    b.reset();
    b[offset] = true;

    for(auto i:path_lengths[1])
    {
        if(i>0)
        {
            auto old_b = b;
            b = old_b<<i;
            b |= old_b>>i;
        }
    }

    if(!b[offset + y])
    {
        cout<<"No"<<endl;
        return;
    }

    cout<<"Yes"<<endl;

}


signed main()
{
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
    cerr.tie(NULL);
#ifndef ONLINE_JUDGE
    if (fopen("INPUT.txt", "r"))
    {
        freopen("INPUT.txt", "r", stdin);
        freopen("OUTPUT.txt", "w", stdout);
    }
#endif
    auto clk = clock();
    mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());
    // -------------------------------------Code starts here---------------------------------------------------------------------

    int t = 1;
    // cin >> t;

    for (int test = 1; test <= t; test++)
    {
        // cout<<"Case #"<<test<<":\n";
        //cout<<"Trip #"<<test<<": ";
        // cout<<endl;
        solve();
        // solveB();

        // cout<<endl;
    }

    // -------------------------------------Code ends here------------------------------------------------------------------

    clk = clock() - clk;
    // cerr << fixed << setprecision(6) << "Time: " << ((long double)clk) / CLOCKS_PER_SEC << "\n";
    return 0;
}


Measured memory_bytes: 3752