# Original solution
import sys
## io ##
def IS(): return sys.stdin.readline().rstrip()
def II(): return int(IS())
def MII(): return list(map(int, IS().split()))
def MIIZ(): return list([x-1 for x in MII()])
## dp ##
def DD2(d1,d2,init=0): return [[init]*d2 for _ in range(d1)]
def DD3(d1,d2,d3,init=0): return [DD2(d2,d3,init) for _ in range(d1)]
## math ##
MOD=10**9+7
def divc(x,y): return -(-x//y)
def divf(x,y): return x//y
def gcd(x,y):
    while y: x,y = y,x%y
    return x
def lcm(x,y): return x*y//gcd(x,y)
def get_primes(MAX_NUM=10**3):
    """Return a list of prime numbers"""
    is_prime = [True] * MAX_NUM
    is_prime[0] = False
    is_prime[1] = False
    primes = []
    for i in range(MAX_NUM):
        if is_prime[i]:
            primes.append(i)
            for j in range(2*i, MAX_NUM, i):
                is_prime[j] = False
    return primes
## libs ##
from itertools import accumulate as acc
from collections import deque, Counter
from heapq import heapify, heappop, heappush
from bisect import bisect_left
 
#======================================================#
 
def main():
    s = IS()
    x, y = MII()
    n = len(s)
    dpx = DD2(n,10**5,init=False)
    dpy = DD2(n,10**5,init=False)
    ff = s.split('T')
    ffx = [len(f) for f in ff[::2]]
    ffy = [len(f) for f in ff[1::2]]
    nx = len(ffx)
    ny = len(ffy)
    if len(ffx) > 0:
        dpx[0][ffx[0]] = True
        for i in range(1, nx):
            for j in range(-8000, 8001):
                dpx[i][j] = dpx[i-1][j-ffx[i]] or dpx[i-1][j+ffx[i]]
    if len(ffy) > 0:
        dpy[0][ffy[0]] = dpy[0][-ffy[0]]= True
        for i in range(1, ny):
            for j in range(-8000, 8001):
                dpy[i][j] = dpy[i-1][j-ffy[i]] or dpy[i-1][j+ffy[i]]
    if dpx[nx-1][x] and dpy[ny-1][y]: print('Yes')
    else: print('No')

if __name__ == '__main__':
    main()

# Optimized solution
import sys
## io ##
def IS(): return sys.stdin.readline().rstrip()
def II(): return int(IS())
def MII(): return list(map(int, IS().split()))
def MIIZ(): return list([x-1 for x in MII()])
## dp ##
def DD2(d1,d2,init=0): return [[init]*d2 for _ in range(d1)]
def DD3(d1,d2,d3,init=0): return [DD2(d2,d3,init) for _ in range(d1)]
## math ##
MOD=10**9+7
def divc(x,y): return -(-x//y)
def divf(x,y): return x//y
def gcd(x,y):
    while y: x,y = y,x%y
    return x
def lcm(x,y): return x*y//gcd(x,y)
def get_primes(MAX_NUM=10**3):
    """Return a list of prime numbers"""
    is_prime = [True] * MAX_NUM
    is_prime[0] = False
    is_prime[1] = False
    primes = []
    for i in range(MAX_NUM):
        if is_prime[i]:
            primes.append(i)
            for j in range(2*i, MAX_NUM, i):
                is_prime[j] = False
    return primes
## libs ##
from itertools import accumulate as acc
from collections import deque, Counter
from heapq import heapify, heappop, heappush
from bisect import bisect_left

#======================================================#

def main():
    s = IS()
    x, y = MII()
    ff = s.split('T')
    ffx = [len(f) for f in ff[::2]]
    ffy = [len(f) for f in ff[1::2]]

    nx = ffx.pop(0)
    ny = 0

    ffx.sort(reverse=True)
    ffy.sort(reverse=True)

    for fx in ffx:
        if x >= nx: nx += fx
        else: nx -= fx
    for fy in ffy:
        if y >= ny: ny += fy
        else: ny -= fy

    if nx == x and ny == y: print('Yes')
    else: print('No')

if __name__ == '__main__':
    main()