# regex fix

def f(s):
 for e,b in p:
  if b[1:]:s=re.sub(b,f'[{b}{e}]',s)
 for e,b in p:
  if b>b[1:]:s=re.sub(f'(?<!\[){b}',f'[{b}{e}]',s)
 return s

# more repeated code

def f(s):
 for e,b in p:
  if b[1:]:s=re.sub(f'(?<!\[){b}',f'[{b}{e}]',s)
 for e,b in p:
  if b>b[1:]:s=re.sub(f'(?<!\[){b}',f'[{b}{e}]',s)
 return s

# Python 3.8

def f(s):
 [(s:=re.sub(f'(?<!\[){b}',f'[{b}{e}]',s))for e,b in p if b[1:]]
 [(s:=re.sub(f'(?<!\[){b}',f'[{b}{e}]',s))for e,b in p if b[1:]<b]
 return s

# lambda

lambda s:[(s:=re.sub(f'(?<!\[){b}',f'[{b}{e}]',s))for e,b in p if b[1:]]and[(s:=re.sub(f'(?<!\[){b}',f'[{b}{e}]',s))for e,b in p if b[1:]<b][-1]

# use repeated code

f=eval("lambda s:_]and_<b][-1]".replace('_',"[(s:=re.sub(f'(?<!\[){b}',f'[{b}{e}]',s))for e,b in p if b[1:]"))