Buggy python submission (verdict: Time Limit Exceeded):
import re
import sys
import math
import itertools
import bisect
from copy import copy
from collections import deque,Counter
from decimal import Decimal
import functools
def v(): return input()
def k(): return int(input())
def S(): return input().split()
def I(): return map(int,input().split())
def X(): return list(input())
def L(): return list(input().split())
def l(): return list(map(int,input().split()))
def lcm(a,b): return a*b//math.gcd(a,b)
sys.setrecursionlimit(10 ** 9)
mod = 10**9+7
cnt = 0
ans = 0
inf = float("inf")
al = "abcdefghijklmnopqrstuvwxyz"

s = v()
q = k()
q_list = deque(deque(L()) for i in range(q))

while q_list:
    a = q_list.popleft()
    while a:
        b = a.popleft()
        if b == "1":
            s = s[::-1]
        else:
            c = a.popleft()
            d = a.popleft()
            if c == "1":
                s = d+s
            else:
                s = s+d

print(s)

Fixed submission:
import re
import sys
import math
import itertools
import bisect
from copy import copy
from collections import deque,Counter
from decimal import Decimal
import functools
def v(): return input()
def k(): return int(input())
def S(): return input().split()
def I(): return map(int,input().split())
def X(): return list(input())
def L(): return list(input().split())
def l(): return list(map(int,input().split()))
def lcm(a,b): return a*b//math.gcd(a,b)
sys.setrecursionlimit(10 ** 9)
mod = 10**9+7
cnt = 0
ans = 0
inf = float("inf")
al = "abcdefghijklmnopqrstuvwxyz"
AL = al.upper()

s = deque(X())
n = k()
normal = 0
for i in range(n):
  a = input().split()
  if int(a[0]) == 1:
    normal ^= 1
  else:
    k = int(a[1]) - 1
    k ^= normal
    if k == 1:
      s.append(a[2])
    else:
      s.appendleft(a[2])
print(''.join(s) if normal == 0 else ''.join(list(s)[::-1]))

Buggy python submission (verdict: Time Limit Exceeded):
import re
import sys
import math
import itertools
import bisect
from copy import copy
from collections import deque,Counter
from decimal import Decimal
import functools
def v(): return input()
def k(): return int(input())
def S(): return input().split()
def I(): return map(int,input().split())
def X(): return list(input())
def L(): return list(input().split())
def l(): return list(map(int,input().split()))
def lcm(a,b): return a*b//math.gcd(a,b)
sys.setrecursionlimit(10 ** 9)
mod = 10**9+7
cnt = 0
ans = 0
inf = float("inf")
al = "abcdefghijklmnopqrstuvwxyz"

s = v()
q = k()
q_list = deque(L() for i in range(q))

while q_list:
    a = q_list.popleft()
    a = deque(a)
    while a:
        b = a.popleft()
        if b == "1":
            s = s[::-1]
        else:
            c = a.popleft()
            d = a.popleft()
            if c == "1":
                s = d+s
            else:
                s = s+d

print(s)             

Fixed submission:
import re
import sys
import math
import itertools
import bisect
from copy import copy
from collections import deque,Counter
from decimal import Decimal
import functools
def v(): return input()
def k(): return int(input())
def S(): return input().split()
def I(): return map(int,input().split())
def X(): return list(input())
def L(): return list(input().split())
def l(): return list(map(int,input().split()))
def lcm(a,b): return a*b//math.gcd(a,b)
sys.setrecursionlimit(10 ** 9)
mod = 10**9+7
cnt = 0
ans = 0
inf = float("inf")
al = "abcdefghijklmnopqrstuvwxyz"
AL = al.upper()

s = deque(X())
n = k()
normal = 0
for i in range(n):
  a = input().split()
  if int(a[0]) == 1:
    normal ^= 1
  else:
    k = int(a[1]) - 1
    k ^= normal
    if k == 1:
      s.append(a[2])
    else:
      s.appendleft(a[2])
print(''.join(s) if normal == 0 else ''.join(list(s)[::-1]))

Buggy python submission (verdict: Time Limit Exceeded):
import re
import sys
import math
import itertools
import bisect
from copy import copy
from collections import deque,Counter
from decimal import Decimal
import functools
def v(): return input()
def k(): return int(input())
def S(): return input().split()
def I(): return map(int,input().split())
def X(): return list(input())
def L(): return list(input().split())
def l(): return list(map(int,input().split()))
def lcm(a,b): return a*b//math.gcd(a,b)
sys.setrecursionlimit(10 ** 9)
mod = 10**9+7
cnt = 0
ans = 0
inf = float("inf")

s = X()
s = deque(s)
q = k()
for i in range(q):
    i = L()
    if i[0]=="1":
        s.reverse()
        continue
    d = deque(i)
    a = d.popleft()
    if a == 1:
        pass
    else:
        b = d.popleft()
        c = d.popleft()
        if b == "1":
            s.insert(0,c)
        else:
            s.append(c)

print("".join(s))


Fixed submission:
import re
import sys
import math
import itertools
import bisect
from copy import copy
from collections import deque,Counter
from decimal import Decimal
import functools
def v(): return input()
def k(): return int(input())
def S(): return input().split()
def I(): return map(int,input().split())
def X(): return list(input())
def L(): return list(input().split())
def l(): return list(map(int,input().split()))
def lcm(a,b): return a*b//math.gcd(a,b)
sys.setrecursionlimit(10 ** 9)
mod = 10**9+7
cnt = 0
ans = 0
inf = float("inf")
al = "abcdefghijklmnopqrstuvwxyz"
AL = al.upper()

s = deque(X())
n = k()
normal = 0
for i in range(n):
  a = input().split()
  if int(a[0]) == 1:
    normal ^= 1
  else:
    k = int(a[1]) - 1
    k ^= normal
    if k == 1:
      s.append(a[2])
    else:
      s.appendleft(a[2])
print(''.join(s) if normal == 0 else ''.join(list(s)[::-1]))

Buggy python submission (verdict: Time Limit Exceeded):
import sys
import math
import itertools
import bisect
from copy import copy
from collections import deque,Counter
from decimal import Decimal
import functools
def s(): return input()
def k(): return int(input())
def S(): return input().split()
def I(): return map(int,input().split())
def X(): return list(input())
def L(): return list(input().split())
def l(): return list(map(int,input().split()))
def lcm(a,b): return a*b//math.gcd(a,b)
sys.setrecursionlimit(10 ** 9)
mod = 10**9+7
cnt = 0
ans = 0
inf = float("inf")

s = X()
q = k()
for i in range(q):
    a = X()
    if a[0] == "1":
        s.reverse()
    else:
        if a[2] == "1":
            s.insert(0,a[4])
        else:
            s.append(a[4])

print("".join(s))


Fixed submission:
import re
import sys
import math
import itertools
import bisect
from copy import copy
from collections import deque,Counter
from decimal import Decimal
import functools
def v(): return input()
def k(): return int(input())
def S(): return input().split()
def I(): return map(int,input().split())
def X(): return list(input())
def L(): return list(input().split())
def l(): return list(map(int,input().split()))
def lcm(a,b): return a*b//math.gcd(a,b)
sys.setrecursionlimit(10 ** 9)
mod = 10**9+7
cnt = 0
ans = 0
inf = float("inf")
al = "abcdefghijklmnopqrstuvwxyz"
AL = al.upper()

s = deque(X())
n = k()
normal = 0
for i in range(n):
  a = input().split()
  if int(a[0]) == 1:
    normal ^= 1
  else:
    k = int(a[1]) - 1
    k ^= normal
    if k == 1:
      s.append(a[2])
    else:
      s.appendleft(a[2])
print(''.join(s) if normal == 0 else ''.join(list(s)[::-1]))