В чем здесь ошибка, не понимаю

def bubble(line, bruh=None):
    amount_of_lines = len(line)
    switch = False
    while not switch:
        switch = True
    for i in range(amount_of_lines - 1):
        if bruh(line[i]) > bruh(line[i + 1]):
                line[i], line[i + 1] = line[i + 1], line[i]
                switch = False
def conclusion():
    line = [input() for _ in range(3)]
    bubble(line, bruh=lambda x: (len(x), x))
    print(*line, sep="\n")

def bubble(line, bruh=None):
amount_of_lines = len(line)
switch = False
while not switch:
switch = True
for i in range(amount_of_lines - 1):
if bruh(line[i]) > bruh(line[i + 1]):
line[i], line[i + 1] = line[i + 1], line[i]
switch = False
def conclusion():
line = [input() for _ in range(3)]
bubble(line, bruh=lambda x: (len(x), x))
print(*line, sep="\n")

def bubble(line, bruh=None):
    amount_of_lines = len(line)
switch = False
while not switch:
    switch = True
for i in range(amount_of_lines - 1):
    if bruh(line[i]) > bruh(line[i + 1]):
        line[i], line[i + 1] = line[i + 1], line[i]
switch = False
def conclusion():
    line = [input() for _ in range(3)]
bubble(line, bruh=lambda x: (len(x), x))
print(*line, sep="\n")