Buggy python submission (verdict: Runtime Error):
from sys import stdin
from itertools import accumulate, dropwhile, takewhile, groupby

# 入力 =stdin.readline().rstrip()
# 分割 = stdin.readline().rstrip().split()

'''
条件に合うものを絞り込む
data = [1, 2, 3]
s = [x for x in data if x % 3 == 0]
'''

'''
文字配列を数値に
l_si = ['-10', '0', '100']

l_si_i = [int(s) for s in l_si]
'''

'''
a = [2, 4, 6, 8]
b = [3, 6, 9]

print(list(set(a) | set(b)))  # 和集合
print(list(set(a) & set(b)))  # 積集合
'''

'''
N = int(stdin.readline().rstrip())
A = [int(x) for x in stdin.readline().rstrip().split()]
count = 0
while len([x for x in A if x % 2 == 0]) == N:
    A = list(map(lambda y: y / 2, A))
    count += 1
print(count)
'''

'''
.append(要素)
.insert(場所,要素)
-1で末尾で末尾から一つ前
'''
'''
間に空白追加
' '.join(lis)
'''
T = stdin.readline().rstrip()
num = int(stdin.readline().rstrip())
midcount = 1
res = []
ch = ''
for t in range(len(T)):
    if (ch == T[t] and t != 0):
        midcount += 1
    elif (ch != T[t] and t != 0):
        res.append(midcount)
        midcount = 1
    if (ch == T[t] and t == len(T) - 1):
        res.append(midcount)
    ch = T[t]

if (len(res) == 1):
    print(str(int(num * len(T) / 2)))
elif (T[0] == T[len(T) - 1]):
    counter = 0
    tes = []
    tes.append(res[0] + res[len(res) - 1])
    tes += res[1: len(res) - 1]
    for x in tes:
        counter += int(x / 2)
    counter *= num - 1
    for x in res:
        counter += int(x / 2)
    print(counter)
else:
    counter = 0
    for x in res:
        counter += int(x / 2)
    counter *= num
    print(counter)


Fixed submission:
from sys import stdin
from itertools import accumulate, dropwhile, takewhile, groupby
import copy

# 入力 =stdin.readline().rstrip()
# 分割 = stdin.readline().rstrip().split()

'''
条件に合うものを絞り込む
data = [1, 2, 3]
s = [x for x in data if x % 3 == 0]
'''

'''
文字配列を数値に
l_si = ['-10', '0', '100']

l_si_i = [int(s) for s in l_si]
'''

'''
a = [2, 4, 6, 8]
b = [3, 6, 9]

print(list(set(a) | set(b)))  # 和集合
print(list(set(a) & set(b)))  # 積集合
'''

'''
N = int(stdin.readline().rstrip())
A = [int(x) for x in stdin.readline().rstrip().split()]
count = 0
while len([x for x in A if x % 2 == 0]) == N:
    A = list(map(lambda y: y / 2, A))
    count += 1
print(count)
'''

'''
.append(要素)
.insert(場所,要素)
-1で末尾で末尾から一つ前
'''
'''
間に空白追加
' '.join(lis)
'''
T = stdin.readline().rstrip()
num = int(stdin.readline().rstrip())
midcount = 1
res = []
ch = ''
for t in range(len(T)):
    if (ch == T[t] and t != 0):
        midcount += 1
    elif (ch != T[t] and t != 0):
        res.append(midcount)
        midcount = 1
    if (ch == T[t] and t == len(T) - 1):
        res.append(midcount)
    ch = T[t]
if (len(T) == 1):
    res = [1]
if (len(res) == 1):
    print(str(int(num * len(T) / 2)))
elif (T[0] == T[len(T) - 1]):
    counter = 0
    tes = []
    tes.append(res[0] + res[len(res) - 1])
    tes += res[1: len(res) - 1]
    for x in tes:
        counter += int(x / 2)
    counter *= num - 1
    for x in res:
        counter += int(x / 2)
    print(counter)
else:
    counter = 0
    for x in res:
        counter += int(x / 2)
    counter *= num
    print(counter)

Buggy python submission (verdict: Runtime Error):
from sys import stdin
from itertools import accumulate, dropwhile, takewhile, groupby
import copy

# 入力 =stdin.readline().rstrip()
# 分割 = stdin.readline().rstrip().split()

'''
条件に合うものを絞り込む
data = [1, 2, 3]
s = [x for x in data if x % 3 == 0]
'''

'''
文字配列を数値に
l_si = ['-10', '0', '100']

l_si_i = [int(s) for s in l_si]
'''

'''
a = [2, 4, 6, 8]
b = [3, 6, 9]

print(list(set(a) | set(b)))  # 和集合
print(list(set(a) & set(b)))  # 積集合
'''

'''
N = int(stdin.readline().rstrip())
A = [int(x) for x in stdin.readline().rstrip().split()]
count = 0
while len([x for x in A if x % 2 == 0]) == N:
    A = list(map(lambda y: y / 2, A))
    count += 1
print(count)
'''

'''
.append(要素)
.insert(場所,要素)
-1で末尾で末尾から一つ前
'''
'''
間に空白追加
' '.join(lis)
'''
T = stdin.readline().rstrip()
num = int(stdin.readline().rstrip())
midcount = 1
res = []
ch = ''
for t in range(len(T)):
    if (ch == T[t] and t != 0):
        midcount += 1
    elif (ch != T[t] and t != 0):
        res.append(midcount)
        midcount = 1
    if (ch == T[t] and t == len(T) - 1):
        res.append(midcount)
    ch = T[t]

if (len(res) == 1):
    print(str(int(num * len(T) / 2)))
elif (T[0] == T[len(T) - 1]):
    counter = 0
    tes = []
    tes.append(res[0] + res[len(res) - 1])
    tes += res[1: len(res) - 1]
    for x in tes:
        counter += int(x / 2)
    counter *= num - 1
    for x in res:
        counter += int(x / 2)
    print(counter)
else:
    counter = 0
    for x in res:
        counter += int(x / 2)
    counter *= num
    print(counter)


Fixed submission:
from sys import stdin
from itertools import accumulate, dropwhile, takewhile, groupby
import copy

# 入力 =stdin.readline().rstrip()
# 分割 = stdin.readline().rstrip().split()

'''
条件に合うものを絞り込む
data = [1, 2, 3]
s = [x for x in data if x % 3 == 0]
'''

'''
文字配列を数値に
l_si = ['-10', '0', '100']

l_si_i = [int(s) for s in l_si]
'''

'''
a = [2, 4, 6, 8]
b = [3, 6, 9]

print(list(set(a) | set(b)))  # 和集合
print(list(set(a) & set(b)))  # 積集合
'''

'''
N = int(stdin.readline().rstrip())
A = [int(x) for x in stdin.readline().rstrip().split()]
count = 0
while len([x for x in A if x % 2 == 0]) == N:
    A = list(map(lambda y: y / 2, A))
    count += 1
print(count)
'''

'''
.append(要素)
.insert(場所,要素)
-1で末尾で末尾から一つ前
'''
'''
間に空白追加
' '.join(lis)
'''
T = stdin.readline().rstrip()
num = int(stdin.readline().rstrip())
midcount = 1
res = []
ch = ''
for t in range(len(T)):
    if (ch == T[t] and t != 0):
        midcount += 1
    elif (ch != T[t] and t != 0):
        res.append(midcount)
        midcount = 1
    if (ch == T[t] and t == len(T) - 1):
        res.append(midcount)
    ch = T[t]
if (len(T) == 1):
    res = [1]
if (len(res) == 1):
    print(str(int(num * len(T) / 2)))
elif (T[0] == T[len(T) - 1]):
    counter = 0
    tes = []
    tes.append(res[0] + res[len(res) - 1])
    tes += res[1: len(res) - 1]
    for x in tes:
        counter += int(x / 2)
    counter *= num - 1
    for x in res:
        counter += int(x / 2)
    print(counter)
else:
    counter = 0
    for x in res:
        counter += int(x / 2)
    counter *= num
    print(counter)

Buggy python submission (verdict: Runtime Error):
from sys import stdin
from itertools import accumulate, dropwhile, takewhile, groupby
import copy

# 入力 =stdin.readline().rstrip()
# 分割 = stdin.readline().rstrip().split()

'''
条件に合うものを絞り込む
data = [1, 2, 3]
s = [x for x in data if x % 3 == 0]
'''

'''
文字配列を数値に
l_si = ['-10', '0', '100']

l_si_i = [int(s) for s in l_si]
'''

'''
a = [2, 4, 6, 8]
b = [3, 6, 9]

print(list(set(a) | set(b)))  # 和集合
print(list(set(a) & set(b)))  # 積集合
'''

'''
N = int(stdin.readline().rstrip())
A = [int(x) for x in stdin.readline().rstrip().split()]
count = 0
while len([x for x in A if x % 2 == 0]) == N:
    A = list(map(lambda y: y / 2, A))
    count += 1
print(count)
'''

'''
.append(要素)
.insert(場所,要素)
-1で末尾で末尾から一つ前
'''
'''
間に空白追加
' '.join(lis)
'''
T = stdin.readline().rstrip()
num = int(stdin.readline().rstrip())
midcount = 1
res = []
ch = ''
for t in range(len(T)):
    if (ch == T[t] and t != 0):
        midcount += 1
    elif (ch != T[t] and t != 0):
        res.append(midcount)
        midcount = 1
    if (ch == T[t] and t == len(T) - 1):
        res.append(midcount)
    ch = T[t]

print(res)
if (len(res) == 1):
    print(str(int(num * len(T) / 2)))
elif (T[0] == T[len(T) - 1]):
    counter = 0
    tes = []
    tes.append(res[0] + res[len(res) - 1])
    tes += res[1: len(res) - 1]
    for x in tes:
        counter += int(x / 2)
    counter *= num - 1
    for x in res:
        counter += int(x / 2)
    print(counter)
else:
    counter = 0
    for x in res:
        counter += int(x / 2)
    counter *= num
    print(counter)


Fixed submission:
from sys import stdin
from itertools import accumulate, dropwhile, takewhile, groupby
import copy

# 入力 =stdin.readline().rstrip()
# 分割 = stdin.readline().rstrip().split()

'''
条件に合うものを絞り込む
data = [1, 2, 3]
s = [x for x in data if x % 3 == 0]
'''

'''
文字配列を数値に
l_si = ['-10', '0', '100']

l_si_i = [int(s) for s in l_si]
'''

'''
a = [2, 4, 6, 8]
b = [3, 6, 9]

print(list(set(a) | set(b)))  # 和集合
print(list(set(a) & set(b)))  # 積集合
'''

'''
N = int(stdin.readline().rstrip())
A = [int(x) for x in stdin.readline().rstrip().split()]
count = 0
while len([x for x in A if x % 2 == 0]) == N:
    A = list(map(lambda y: y / 2, A))
    count += 1
print(count)
'''

'''
.append(要素)
.insert(場所,要素)
-1で末尾で末尾から一つ前
'''
'''
間に空白追加
' '.join(lis)
'''
T = stdin.readline().rstrip()
num = int(stdin.readline().rstrip())
midcount = 1
res = []
ch = ''
for t in range(len(T)):
    if (ch == T[t] and t != 0):
        midcount += 1
    elif (ch != T[t] and t != 0):
        res.append(midcount)
        midcount = 1
    if (ch == T[t] and t == len(T) - 1):
        res.append(midcount)
    ch = T[t]
if (len(T) == 1):
    res = [1]
if (len(res) == 1):
    print(str(int(num * len(T) / 2)))
elif (T[0] == T[len(T) - 1]):
    counter = 0
    tes = []
    tes.append(res[0] + res[len(res) - 1])
    tes += res[1: len(res) - 1]
    for x in tes:
        counter += int(x / 2)
    counter *= num - 1
    for x in res:
        counter += int(x / 2)
    print(counter)
else:
    counter = 0
    for x in res:
        counter += int(x / 2)
    counter *= num
    print(counter)

Buggy python submission (verdict: Time Limit Exceeded):
from sys import stdin
from itertools import accumulate, dropwhile, takewhile, groupby

# 入力 =stdin.readline().rstrip()
# 分割 = stdin.readline().rstrip().split()

'''
条件に合うものを絞り込む
data = [1, 2, 3]
s = [x for x in data if x % 3 == 0]
'''

'''
文字配列を数値に
l_si = ['-10', '0', '100']

l_si_i = [int(s) for s in l_si]
'''

'''
a = [2, 4, 6, 8]
b = [3, 6, 9]

print(list(set(a) | set(b)))  # 和集合
print(list(set(a) & set(b)))  # 積集合
'''

'''
N = int(stdin.readline().rstrip())
A = [int(x) for x in stdin.readline().rstrip().split()]
count = 0
while len([x for x in A if x % 2 == 0]) == N:
    A = list(map(lambda y: y / 2, A))
    count += 1
print(count)
'''

'''
.append(要素)
.insert(場所,要素)
-1で末尾で末尾から一つ前
'''
'''
間に空白追加
' '.join(lis)
'''
T = stdin.readline().rstrip()
num = int(stdin.readline().rstrip())
tes = (num * len(T))
ch = ''
counter = 0
changed = False
lis = []
for x in range(len(T) * num):
    if (ch == T[x % len(T)] and not changed):
        counter += 1
        changed = True
    elif (changed):
        changed = False
    ch = T[x % len(T)]
print(counter)


Fixed submission:
from sys import stdin
from itertools import accumulate, dropwhile, takewhile, groupby
import copy

# 入力 =stdin.readline().rstrip()
# 分割 = stdin.readline().rstrip().split()

'''
条件に合うものを絞り込む
data = [1, 2, 3]
s = [x for x in data if x % 3 == 0]
'''

'''
文字配列を数値に
l_si = ['-10', '0', '100']

l_si_i = [int(s) for s in l_si]
'''

'''
a = [2, 4, 6, 8]
b = [3, 6, 9]

print(list(set(a) | set(b)))  # 和集合
print(list(set(a) & set(b)))  # 積集合
'''

'''
N = int(stdin.readline().rstrip())
A = [int(x) for x in stdin.readline().rstrip().split()]
count = 0
while len([x for x in A if x % 2 == 0]) == N:
    A = list(map(lambda y: y / 2, A))
    count += 1
print(count)
'''

'''
.append(要素)
.insert(場所,要素)
-1で末尾で末尾から一つ前
'''
'''
間に空白追加
' '.join(lis)
'''
T = stdin.readline().rstrip()
num = int(stdin.readline().rstrip())
midcount = 1
res = []
ch = ''
for t in range(len(T)):
    if (ch == T[t] and t != 0):
        midcount += 1
    elif (ch != T[t] and t != 0):
        res.append(midcount)
        midcount = 1
    if (ch == T[t] and t == len(T) - 1):
        res.append(midcount)
    ch = T[t]
if (len(T) == 1):
    res = [1]
if (len(res) == 1):
    print(str(int(num * len(T) / 2)))
elif (T[0] == T[len(T) - 1]):
    counter = 0
    tes = []
    tes.append(res[0] + res[len(res) - 1])
    tes += res[1: len(res) - 1]
    for x in tes:
        counter += int(x / 2)
    counter *= num - 1
    for x in res:
        counter += int(x / 2)
    print(counter)
else:
    counter = 0
    for x in res:
        counter += int(x / 2)
    counter *= num
    print(counter)