Buggy python submission (verdict: Runtime Error):
L = map(str, input().split())

s = L[0]
S = list(s)
t = L[1]
T = list(t)

N = len[S] - 1
i = 0

while N != i:
    if S[i] != T[i]:
        S[i] = T[i]
    i += 1

print(i + 1)

Fixed submission:
s,t = input(), input()

S = list(s)
T = list(t)

N = len(s) - 1
i = 0
counter = 0

while N + 1 != i:
    if S[i] != T[i]:
        S[i] = T[i]
        counter += 1
    i += 1

print(counter)

Buggy python submission (verdict: Runtime Error):
L = map(str, input().split())

s = L[0]
S = list(s)
t = L[1]
T = list(t)

N = len[S]
i = 1

while N != i:
    if S[i] != T[i]:
        S[i] = T[i]
    i += 1

Fixed submission:
s,t = input(), input()

S = list(s)
T = list(t)

N = len(s) - 1
i = 0
counter = 0

while N + 1 != i:
    if S[i] != T[i]:
        S[i] = T[i]
        counter += 1
    i += 1

print(counter)

Buggy python submission (verdict: Runtime Error):
L = map(str, input().split())

s = L[0]
S = list(s)
t = L[1]
T = list(t)

N = len[S]
i = 1

while N != i:
    if S[i] != T[i]:
        S[i] = T[i]
    i += 1

Fixed submission:
s,t = input(), input()

S = list(s)
T = list(t)

N = len(s) - 1
i = 0
counter = 0

while N + 1 != i:
    if S[i] != T[i]:
        S[i] = T[i]
        counter += 1
    i += 1

print(counter)

Buggy python submission (verdict: Runtime Error):
L = map(str, input().split())

s = L[0]
S = list(s)
t = L[1]
T = list(t)

N = len[S]
i = 1

while N != i:
    if S[i] != T[i]:
        S[i] = T[i]
        i += 1

Fixed submission:
s,t = input(), input()

S = list(s)
T = list(t)

N = len(s) - 1
i = 0
counter = 0

while N + 1 != i:
    if S[i] != T[i]:
        S[i] = T[i]
        counter += 1
    i += 1

print(counter)

Buggy python submission (verdict: Runtime Error):
L = map(str, input())

s = L[0]
S = list(s)
t = L[1]
T = list(t)

N = len[S]
i = 1

while N != i:
    if S[i] != T[i]:
        S[i] = T[i]
        i += 1

Fixed submission:
s,t = input(), input()

S = list(s)
T = list(t)

N = len(s) - 1
i = 0
counter = 0

while N + 1 != i:
    if S[i] != T[i]:
        S[i] = T[i]
        counter += 1
    i += 1

print(counter)

Buggy python submission (verdict: Runtime Error):
rows = int(input())
L = [input() for i in range(rows)]

s = L[0]
S = list(s)
t = L[1]
T = list(t)

N = len[S]
i = 1

while N != i:
    if S[i] != T[i]:
        S[i] = T[i]
        i += 1

Fixed submission:
s,t = input(), input()

S = list(s)
T = list(t)

N = len(s) - 1
i = 0
counter = 0

while N + 1 != i:
    if S[i] != T[i]:
        S[i] = T[i]
        counter += 1
    i += 1

print(counter)

Buggy python submission (verdict: Runtime Error):
L = list(input().split())

s = L[0]
S = list(s)
t = L[1]
T = list(t)

N = len[S]
i = 1

while N != i:
    if S[i] != T[i]:
        S[i] = T[i]
        i += 1

Fixed submission:
s,t = input(), input()

S = list(s)
T = list(t)

N = len(s) - 1
i = 0
counter = 0

while N + 1 != i:
    if S[i] != T[i]:
        S[i] = T[i]
        counter += 1
    i += 1

print(counter)

Buggy python submission (verdict: Runtime Error):
s = input()
S = list(S)
T = list(input())
N = len(s)
i = 1

while N != i:
    if S[i] != T[i]:
        S[i] = T[i]
        i += 1

Fixed submission:
s,t = input(), input()

S = list(s)
T = list(t)

N = len(s) - 1
i = 0
counter = 0

while N + 1 != i:
    if S[i] != T[i]:
        S[i] = T[i]
        counter += 1
    i += 1

print(counter)