Buggy python submission (verdict: Runtime Error):
H, W, N = map(int, input().split())
s_r, s_c = map(int, input().split())
S = input()
T = input()

# vertical direction
up, down = 0, H
for i in range(H, -1, -1):
    if T[i] == 'U':
        down = min(H, down + 1)
    elif T[i] == 'D':
        up = max(0, up - 1)
    
    if S[i] == 'U':
        up += 1
    elif S[i] == 'D':
        down -= 1
    
    if up >= down:
        print('NO')
        exit()
        
# horizontal direction
left, right = 0, W
for j in range(W-1, -1, -1):    
    if T[j] == 'L':
        right = min(W, right + 1)
    elif T[j] == 'R':
        left = max(0, left - 1)
    
    if S[j] == 'L':
        left += 1
    elif S[j] == 'R':
        right -= 1
    
    if left >= right:
        print('NO')
        exit()
if up <= s_r < down and left <= s_c < right:
    print('YES')
else:
    print('NO')

Fixed submission:
H, W, N = map(int, input().split())
s_r, s_c = map(int, input().split())
S = input()
T = input()

# vertical direction
up, down = 0, H-1
for i in range(N-1, -1, -1):
    if T[i] == 'U':
        down = min(H-1, down + 1)
    elif T[i] == 'D':
        up = max(0, up - 1)
    
    if S[i] == 'U':
        up += 1
    elif S[i] == 'D':
        down -= 1
    
    if up > down:
        print('NO')
        exit()
        
# horizontal direction
left, right = 0, W-1
for i in range(N-1, -1, -1):    
    if T[i] == 'L':
        right = min(W-1, right + 1)
    elif T[i] == 'R':
        left = max(0, left - 1)
    
    if S[i] == 'L':
        left += 1
    elif S[i] == 'R':
        right -= 1
    
    if left > right:
        print('NO')
        exit()
if up <= s_r-1 <=down and left <= s_c-1 <= right:
    print('YES')
else:
    print('NO')

Buggy python submission (verdict: Runtime Error):
import sys

H, W, N = map(int, input().split())
s_r, s_c = map(int, input().split())
S = input()
T = input()

# vertical direction
up, down = 0, H-1
for i in range(H, -1, -1):
    if T[i] == 'U':
        down = min(H, down + 1)
    elif T[i] == 'D':
        up = max(0, up - 1)
    
    if S[i] == 'U':
        up += 1
    elif S[i] == 'D':
        down -= 1
    
    if up >= down:
        print('NO')
        sys.exit()
        
# horizontal direction
left, right = 0, W-1
for j in range(W-1, -1, -1):    
    if T[j] == 'L':
        right = min(H, right + 1)
    elif T[j] == 'R':
        left = max(0, left - 1)
    
    if S[j] == 'L':
        left += 1
    elif S[j] == 'R':
        right -= 1
    
    if left >= right:
        print('NO')
        sys.exit()
if up <= s_r <= down and left <= s_c <= right:
    print('YES')
else:
    print('NO')

Fixed submission:
H, W, N = map(int, input().split())
s_r, s_c = map(int, input().split())
S = input()
T = input()

# vertical direction
up, down = 0, H-1
for i in range(N-1, -1, -1):
    if T[i] == 'U':
        down = min(H-1, down + 1)
    elif T[i] == 'D':
        up = max(0, up - 1)
    
    if S[i] == 'U':
        up += 1
    elif S[i] == 'D':
        down -= 1
    
    if up > down:
        print('NO')
        exit()
        
# horizontal direction
left, right = 0, W-1
for i in range(N-1, -1, -1):    
    if T[i] == 'L':
        right = min(W-1, right + 1)
    elif T[i] == 'R':
        left = max(0, left - 1)
    
    if S[i] == 'L':
        left += 1
    elif S[i] == 'R':
        right -= 1
    
    if left > right:
        print('NO')
        exit()
if up <= s_r-1 <=down and left <= s_c-1 <= right:
    print('YES')
else:
    print('NO')