Buggy python submission (verdict: Time Limit Exceeded):
# -*- coding: utf-8 -*-      

s = input()
dstx, dsty = list(map(int,input().split()))
x = []
y = []
tmp = 0
xy = 0
for i in range(len(s)):
    if(s[i]=='F'):
        tmp += 1
    elif(s[i]=='T' and xy==0):
        x.append(tmp)
        tmp = 0
        xy = 1
    elif(s[i]=='T' and xy==1):
        y.append(tmp)
        tmp = 0
        xy = 0
else:
    if(xy==0):
        x.append(tmp)
    else:
        y.append(tmp)
        
dpx = [{} for i in range(len(x))]
dpy = [{} for i in range(len(y)+1)]
dpx[0][x[0]] = True
dpy[0][0] = True
for i, dx in enumerate(x[1:]):
    for j in dpx[i]:
        dpx[i+1][j+dx] = True
        dpx[i+1][j-dx] = True
for i, dy in enumerate(y):
    for j in dpy[i]:
        dpy[i+1][j+dy] = True
        dpy[i+1][j-dy] = True
    
if(dstx not in dpx[-1] or dsty not in dpy[-1]):
    print('No')
else:
    print('Yes')

Fixed submission:
# -*- coding: utf-8 -*-     
import sys

s = input()
dstx, dsty = list(map(int,input().split()))
x = []
y = []
tmp = 0
xy = 0
for i in range(len(s)):
    if(s[i]=='F'):
        tmp += 1
    elif(s[i]=='T' and xy==0):
        x.append(tmp)
        tmp = 0
        xy = 1
    elif(s[i]=='T' and xy==1):
        y.append(tmp)
        tmp = 0
        xy = 0
else:
    if(xy==0):
        x.append(tmp)
    else:
        y.append(tmp)
dpx = [{} for i in range(len(x))]
dpy = [{} for i in range(len(y)+1)]
dpx[0][x[0]] = True
dpy[0][0] = True
for i, dx in enumerate(x[1:]):
    for j in dpx[i]:
        dpx[i+1][j+dx] = True
        dpx[i+1][j-dx] = True
if(dstx not in dpx[-1]):
    print('No')
    sys.exit()
for i, dy in enumerate(y):
    for j in dpy[i]:
        dpy[i+1][j+dy] = True
        dpy[i+1][j-dy] = True
    
if(dstx not in dpx[-1] or dsty not in dpy[-1]):
    print('No')
else:
    print('Yes')

Buggy python submission (verdict: Time Limit Exceeded):
# -*- coding: utf-8 -*-        
import numpy as np

s = input()
dstx, dsty = list(map(int,input().split()))
x = []
y = []
tmp = 0
xy = 0
for i in range(len(s)):
    if(s[i]=='F'):
        tmp += 1
    elif(s[i]=='T' and xy==0):
        x.append(tmp)
        tmp = 0
        xy = 1
    elif(s[i]=='T' and xy==1):
        y.append(tmp)
        tmp = 0
        xy = 0
else:
    if(xy==0):
        x.append(tmp)
    else:
        y.append(tmp)
        
dpx = np.zeros((len(x),16002),dtype='bool')
dpy = np.zeros((len(y)+1,16002),dtype='bool')
dpx[0][8001+x[0]] = True
dpy[0][8001] = True
for i in range(1,len(x)):
    for j in range(0,16002):
        if(j-x[i]<0):
            dpx[i][j] = dpx[i-1][j+x[i]]
        elif(j+x[i]>16001):
            dpx[i][j] = dpx[i-1][j-x[i]]
        else:
            dpx[i][j] = dpx[i-1][j-x[i]] or dpx[i-1][j+x[i]]
for i in range(1,len(y)+1):
    for j in range(0,16002):
        if(j-y[i-1]<0):
            dpy[i][j] = dpy[i-1][j+y[i-1]]
        elif(j+y[i-1]>16001):
            dpy[i][j] = dpy[i-1][j-y[i-1]] 
        else:
            dpy[i][j] = dpy[i-1][j-y[i-1]] or dpy[i-1][j+y[i-1]]

if(dpx[-1][8001+dstx] and dpy[-1][8001+dsty]):
    print('Yes')
else:
    print('No')

Fixed submission:
# -*- coding: utf-8 -*-     
import sys

s = input()
dstx, dsty = list(map(int,input().split()))
x = []
y = []
tmp = 0
xy = 0
for i in range(len(s)):
    if(s[i]=='F'):
        tmp += 1
    elif(s[i]=='T' and xy==0):
        x.append(tmp)
        tmp = 0
        xy = 1
    elif(s[i]=='T' and xy==1):
        y.append(tmp)
        tmp = 0
        xy = 0
else:
    if(xy==0):
        x.append(tmp)
    else:
        y.append(tmp)
dpx = [{} for i in range(len(x))]
dpy = [{} for i in range(len(y)+1)]
dpx[0][x[0]] = True
dpy[0][0] = True
for i, dx in enumerate(x[1:]):
    for j in dpx[i]:
        dpx[i+1][j+dx] = True
        dpx[i+1][j-dx] = True
if(dstx not in dpx[-1]):
    print('No')
    sys.exit()
for i, dy in enumerate(y):
    for j in dpy[i]:
        dpy[i+1][j+dy] = True
        dpy[i+1][j-dy] = True
    
if(dstx not in dpx[-1] or dsty not in dpy[-1]):
    print('No')
else:
    print('Yes')