#[allow(unused_imports)]
use std::char::from_digit;
#[allow(unused_imports)]
use std::cmp::{max, min};
#[allow(unused_imports)]
use std::collections::{BTreeMap, BTreeSet, BinaryHeap, HashMap, HashSet, VecDeque};
#[allow(unused_imports)]
use std::fs::File;
#[allow(unused_imports)]
use std::io::prelude::*;
#[allow(unused_imports)]
use std::io::{stdin, stdout, BufReader, BufWriter, Stdin, Stdout, Write};
#[allow(unused_imports)]
use std::mem::swap;
#[allow(unused_imports)]
use std::str::FromStr;
 
type BoxResult<T> = Result<T, Box<std::error::Error>>;
 

fn main() {
    let mut scanner = Scanner::new(stdin());
    let mut s = scanner.read_chars().unwrap();
    s.push('T');
    let params = scanner.read_vector::<i64>().unwrap();
    let (mut x, y) = (params[0], params[1]);
    let mut horizontals = vec![];
    let mut verticals = vec![];
    let mut first = true;
    let mut is_horizon = true;
    let mut forwards = 0;
    for i in 0..s.len() {
        if s[i] == 'F' {
            forwards += 1;
        } else {
            if first {
                x -= forwards as i64;
                first = false;
                is_horizon = false;
            } else if forwards == 0 {
                is_horizon = !is_horizon;
            } else if is_horizon {
                horizontals.push(forwards);
                is_horizon = false;
            } else {
                verticals.push(forwards);
                is_horizon = true;
            }
            forwards = 0;
        }
    }
    if is_possible(x, &horizontals) && is_possible(y, &verticals) {
        println!("Yes");
    } else {
        println!("No");
    }
}

fn is_possible(x: i64, arr: &[usize]) -> bool {
    if arr.len() == 0 {
        return x == 0;
    }
    let sum = arr.iter().fold(0, |acc, val| acc + *val) as i64;
    if sum + x < 0 {
        return false;
    }
    let target = (sum + x) as usize;
    let mut dp = vec![vec![false; target + 1]; arr.len()];
    dp[0][0] = true;
    if 2 * arr[0] <= target {
        dp[0][2 * arr[0]] = true;
    }
    for i in 1..arr.len() {
        for j in 0..(target + 1) {
            dp[i][j] = dp[i - 1][j];
            if 2 * arr[i] <= j && dp[i - 1][j - 2 * arr[i]] {
                dp[i][j] = true;
            }
        }
    }
    dp[arr.len() - 1][target]
}



#[allow(dead_code)]
struct Scanner<R> {
    reader: BufReader<R>,
    buffer: String,
}
impl<R> Scanner<R>
where
    R: Read,
{
    #[allow(dead_code)]
    fn new(inner: R) -> Scanner<R> {
        let reader = BufReader::new(inner);
        let buffer = String::new();
        Scanner {
            reader: reader,
            buffer: buffer,
        }
    }
    #[allow(dead_code)]
    fn with_capacity(capacity: usize, inner: R) -> Scanner<R> {
        let reader = BufReader::with_capacity(capacity, inner);
        let buffer = String::new();
        Scanner {
            reader: reader,
            buffer: buffer,
        }
    }
 
    #[allow(dead_code)]
    fn read_line(&mut self) -> BoxResult<String> {
        self.reader.read_line(&mut self.buffer)?;
        let cloned = self.buffer.trim().to_string();
        self.buffer.clear();
        Ok(cloned)
    }
 
    #[allow(dead_code)]
    fn read<T>(&mut self) -> BoxResult<T>
    where
        T: FromStr,
        T::Err: std::fmt::Debug,
        T::Err: std::error::Error,
        T::Err: 'static,
    {
        self.reader.read_line(&mut self.buffer)?;
        let parsed = self.buffer.trim().parse()?;
        self.buffer.clear();
        Ok(parsed)
    }
    #[allow(dead_code)]
    fn read_vector<T>(&mut self) -> BoxResult<Vec<T>>
    where
        T: FromStr,
        T::Err: std::fmt::Debug,
        T::Err: std::error::Error,
        T::Err: 'static,
    {
        self.reader.read_line(&mut self.buffer)?;
        let parsed_vec = self
            .buffer
            .trim()
            .split_whitespace()
            .map(|s| s.parse())
            .collect::<Result<Vec<_>, _>>()?;
        self.buffer.clear();
        Ok(parsed_vec)
    }
    #[allow(dead_code)]
    fn read_matrix<T>(&mut self, lines: usize) -> BoxResult<Vec<Vec<T>>>
    where
        T: FromStr,
        T::Err: std::fmt::Debug,
        T::Err: std::error::Error,
        T::Err: 'static,
    {
        let mut parsed_matrix = vec![];
        for _ in 0..lines {
            self.reader.read_line(&mut self.buffer)?;
            parsed_matrix.push(
                self.buffer
                    .trim()
                    .split_whitespace()
                    .map(|s| s.parse())
                    .collect::<Result<Vec<_>, _>>()?,
            );
            self.buffer.clear();
        }
        Ok(parsed_matrix)
    }
    #[allow(dead_code)]
    fn read_chars(&mut self) -> BoxResult<Vec<char>> {
        self.reader.read_line(&mut self.buffer)?;
        let chars = self.buffer.trim().chars().collect::<Vec<_>>();
        self.buffer.clear();
        Ok(chars)
    }
}

Measured memory_bytes: 20732