qyliang/CodeNanoFix huggingface dataset:
Buggy code:
s = input()
nocounter = 0
n = len(s)

for i in range(n):
  if (i % 2 == 0):
    if s[i] == "L":
      print("No")
      nocounter = 1
      break
  if (i % 2 == 1):
    if s[i] == "R":
      print("No"):
      nocounter = 1
      break
      
if (nocounter = 0):
  print("Yes")

Fixed code:
s = input()
nocounter = 0
n = len(s)
 
for i in range(n):
  if (i % 2 == 0):
    if s[i] == "L":
      print("No")
      nocounter = 1
      break
  if (i % 2 == 1):
    if s[i] == "R":
      print("No")
      nocounter = 1
      break
      
if (nocounter == 0):
  print("Yes")
Buggy code:
S=list(map(str,input()))
N=len(S)

count=0
for i in range(N):
  if i %2==0:
    if S[i]=="R"or"U"or"D":
      count=count+0
    else:
      count+=1
  if i %2==1:
    if S[i]=="L"or"U"or"D":
      count=count+0
    else:
      count+=1
if count==0:
  print("Yes")
else:
  print("No")

Fixed code:
S=list(map(str,input()))
N=len(S)

count=0
for i in range(N):
  if i %2==0:
    if S[i]=="L":
      count+=1
    else:
      count+=0
  if i %2==1:
    if S[i]=="R":
      count+=1
    else:
      count+=0
if count==0:
  print("Yes")
else:
  print("No")
Buggy code:
A = list(input())
B=[]
C=[]

for i in range(1,len(A),2):
  B.append(A[i])
for i in range(0,len(A),2):
  C.append(A[i])
B=set(B)
C=set(C)

if {'D', 'U', 'L'} <= B and {'D', 'U', 'R'} <= C:
  print('Yes')
else:
  print('No')

Fixed code:
A = list(input())
B=[]
C=[]

for i in range(1,len(A),2):
  B.append(A[i])
for i in range(0,len(A),2):
  C.append(A[i])
B=set(B)
C=set(C)

if {'D', 'U', 'L'} >= B and {'D', 'U', 'R'} >= C:
  print('Yes')
else:
  print('No')
Buggy code:
S=input()
e=S[0::2]
o=S[1::2]
for i in range(len(e)):
    if s[i]=="L":
        print("No")
        break
else:
  for j in range(len(o)):
    if o[j]=="R":
        print("No")
        break 
  else:
    print("Yes")   

Fixed code:
S=input()
e=S[0::2]
o=S[1::2]
for i in range(len(e)):
    if e[i]=="L":
        print("No")
        break
else:
    for j in range(len(o)):
        if o[j]=="R":
            print("No")
            break 
    else:
        print("Yes")
Buggy code:
S=list(input())
a=0
for i in range(1,len(S),2):
    if S[i]=="L" or S[i]=="U" or S[i]=="D":
        a+=1
for j in range(0,len(S),2):
    if S[i]=="L" or S[i]=="U" or S[i]=="D":
        a+=1
if a==len(S):
    print("Yes")
else:
    print("No")

Fixed code:
S=list(input())
a=0
for j in range(0,len(S),2):
    if S[j]=="R" or S[j]=="U" or S[j]=="D":
        a+=1
for i in range(1,len(S),2):
    if S[i]=="L" or S[i]=="U" or S[i]=="D":
        a+=1
if a==len(S):
    print("Yes")
else:
    print("No")
Buggy code:
s = input()

isOdd = True
for i in range(len(s)):
    if i % 2 == 1:
        if s[i] != 'L' and s[i] != 'U' and s[i] != 'D':
            isOdd = False

isEven = True
for i in range(len(s)):
    if i == 0 or i % 2 == 0:
        if s[i] != 'R' and s[i] != 'U' and s[i] != 'D':
            isEven = False

if isOdd == True or isEven == True:
    print("Yes")
else:
    print("No")

Fixed code:
s = input()

isOdd = True
for i in range(len(s)):
    if i % 2 == 1:
        if s[i] != 'L' and s[i] != 'U' and s[i] != 'D':
            isOdd = False

isEven = True
for i in range(len(s)):
    if i == 0 or i % 2 == 0:
        if s[i] != 'R' and s[i] != 'U' and s[i] != 'D':
            isEven = False

if isOdd == True and isEven == True:
    print("Yes")
else:
    print("No")
Buggy code:
S=list(input())

flag=0

for i in range(len(S)):
    if i%2==0:
        if S[i]=='R':
            flag+=1
    elif i%2==1:
        if S[i]=='L':
            flag+=1
if flag==0:
    print('Yes')
else :
    print('No')


Fixed code:
S=list(input())

flag=0

for i in range(len(S)):
    if (i+1)%2==0:
        if S[i]=='R':
            flag+=1
    elif (i+1)%2==1:
        if S[i]=='L':
            flag+=1
if flag==0:
    print('Yes')
else :
    print('No')
Buggy code:
S = input()
for i in range(len(S)):
  if i % 2 == 0 and S[i] == 'L':
      print('No')
      exit()
  elif i % 2 == 0 and S[i] == 'L':
      print('No')
      exit()
print('Yes')


Fixed code:
S = input()
for i in range(len(S)):
  if i % 2 == 0 and S[i] == 'L':
      print('No')
      exit()
  elif i % 2 == 1 and S[i] == 'R':
      print('No')
      exit()
print('Yes')
Buggy code:
S = input()
flag = 0
for i in range(N):
	if i%2 = 0 and (S[i] not in ['R', 'U', 'D']):
		flag = 1
	if i%2 = 1 and (S[i] not in ['L', 'U', 'D']):
		flag = 1
if flag == 0:
	print('Yes')
else:
	print('No')

Fixed code:
S = input()
flag = 0
for i in range(len(S)):
	if i%2 == 0 and (S[i] not in ['R', 'U', 'D']):
		flag = 1
	if i%2 == 1 and (S[i] not in ['L', 'U', 'D']):
		flag = 1
if flag == 0:
	print('Yes')
else:
	print('No')
Buggy code:
S =input()
l =len(S)
letters=[]
for i in range(l):
  letters.append(S[i:i+1])
#print(letters)
indicater =0
#odd...R U D even...L U D
if l%2==0:
  for i in range(l//2):
    if (letters[2*i]=="R" or letters[2*i]=="U" or letters[2*i]=="D") and (letters[2*i+1]=="L" or letters[2*i+1]=="U" or letters[2*i+1]=="D"):
      indicater=indicater+0
    else:
      indicater=indicater+1
if l%2==1:
  for i in range((l+1)//2):
    if (letters[2*i]=="R" or letters[2*i]=="U" or letters[2*i]=="D"):
      indicater=indicater+0
    else:
      indicater=indicater+1
  for i in range((l-1)//2):
    if (letters[2*i+1]=="L" or letters[2*i+1]=="U" or letters[2*i+1]=="D"):
      indicater =indicater+0
    else:
      indicater =indicater+1
#print(indicater)
if indicater==0:
  print("YES")
else:
  print("NO")

Fixed code:
S =input()
l =len(S)
letters=[]
for i in range(l):
  letters.append(S[i:i+1])
#print(letters)
indicater =0
#odd...R U D even...L U D
if l%2==0:
  for i in range(l//2):
    if (letters[2*i]=="R" or letters[2*i]=="U" or letters[2*i]=="D") and (letters[2*i+1]=="L" or letters[2*i+1]=="U" or letters[2*i+1]=="D"):
      indicater=indicater+0
    else:
      indicater=indicater+1
if l%2==1:
  for i in range((l+1)//2):
    if (letters[2*i]=="R" or letters[2*i]=="U" or letters[2*i]=="D"):
      indicater=indicater+0
    else:
      indicater=indicater+1
  for i in range((l-1)//2):
    if (letters[2*i+1]=="L" or letters[2*i+1]=="U" or letters[2*i+1]=="D"):
      indicater =indicater+0
    else:
      indicater =indicater+1
#print(indicater)
if indicater==0:
  print("Yes")
else:
  print("No")
Buggy code:
s = input()
even = ["L","U","D"]
odd = ["R","U","D"]
f=True
for i in range(len(s)):
    if i%2==1:
        if s[i] not in even:
            f = False
    if i%2==0:
        id s[i] not in odd:
            f=False
if f:
    peint("Yes")
else:
    print("No")

  

Fixed code:
s = input()
even = ["L","U","D"]
odd = ["R","U","D"]
f=True
for i in range(len(s)):
    if i%2==1:
        if s[i] not in even:
            f = False
    if i%2==0:
        if s[i] not in odd:
            f=False
if f:
    print("Yes")
else:
    print("No")
Buggy code:
s = input()
count = 0

for i in range(len(s)):
    if (i%2==0 and s[i]== 'R') or (i%2==0 and s[i] = 'L'):
        count = 1
        
if count ==1:
    print('No')
else:
    print('Yes')
        

Fixed code:
s = input()
count = 0

for i in range(len(s)):
    if (i%2==0 and s[i]== 'L') or (i%2==1 and s[i] == 'R'):
        count = 1
        
if count ==1:
    print('No')
else:
    print('Yes')
Buggy code:
a = input()
b = list(a)
count = 0

for i in range(0, len(b)):
    if i % 2 == 0 and b[i] == 'L':
        count += 1
        print('No')
        break
    if i % 2 == 1 and b[i] == 'R':
        print('No')
        break
if count == 0:
    print('Yes')

Fixed code:
a = input()
b = list(a)
count = 0

for i in range(0, len(b)):
    if i % 2 == 0 and b[i] == 'L':
        count += 1
        print('No')
        break
    if i % 2 == 1 and b[i] == 'R':
        count += 1
        print('No')
        break
if count == 0:
    print('Yes')
Buggy code:
A=input()
for i in A[::2]:
  if not i in ["L","U","D"]:
    print("No")
    exit()
for i in A[1::2]:
  if not i in ["R","U","D"]:
    print("No")
    exit()
print("Yes")

Fixed code:
A=input()
for i in A[::2]:
  if not i in ["R","U","D"]:
    print("No")
    exit()
for i in A[1::2]:
  if not i in ["L","U","D"]:
    print("No")
    exit()
print("Yes")
Buggy code:
S = input()
b = list(S)
a = b[0::2]
c = b[1::2]
d = len(b)
e = len(c)
cnt = 0
f = a.count('R')
g = a.count('U')
h = a.count('D')
i = f + g + h

j = b.count('L')
k = b.count('U')
l = b.count('D')
m = j + k + l

if i == d and m == e:
    print('Yes')
else:
    print('No')

Fixed code:
S = input()
b = list(S)
a = b[0::2]
c = b[1::2]
d = len(a)
e = len(c)
cnt = 0
f = a.count('R')
g = a.count('U')
h = a.count('D')
i = f + g + h



j = c.count('L')
k = c.count('U')
l = c.count('D')
m = j + k + l



if i == d and m == e:
    print('Yes')
else:
    print('No')
Buggy code:
s = input()
odd = ["R","U","D"]
even = ["L","U","D"]
flag1=True
flag2=True
for i in range(1,len(s)+1):
    if (i%2==1) and not(s[i-1] in even):
        flag1 =False
    if (i%2==0) and not(s[i-1] in odd):
        flag2 = False

if flag1 and flag2:
    print("Yes")
else:
    print("No")

Fixed code:
s = input()
odd = ["R","U","D"]
even = ["L","U","D"]
flag1=True
flag2=True
for i in range(1,len(s)+1):
    if (i%2==1) and not(s[i-1] in odd):
        flag1 =False
    if (i%2==0) and not(s[i-1] in even):
        flag2 = False

if flag1 and flag2:
    print("Yes")
else:
    print("No")
Buggy code:
N = input()

print("No" if N[::2] == "L" or N[1::2] == "R" else "Yes")

Fixed code:
N = input()
 
print("No" if "L" in N[::2] or "R" in N[1::2] else "Yes")
Buggy code:
text = input()
s = list(text)
n = len(text)

i = 0


while i < n:
    if i % 2 == 0:
        if s[i] == "R" or "U" or "D":
            i += 1

        else:
            print("No")
            break


    elif i % 2 == 1:
        if s[i] == "L" or "U" or "D":
            i += 1
        else:
            print("No")
            break

if i == n:
    print("Yes")
else:
    print("NAZO")


Fixed code:
text = input()
s = list(text)
n = len(text)

i = 0


while i < n:
    if i % 2 == 0:
        if s[i] == "R" or s[i] == "U" or s[i] == "D":
            i += 1

        else:
            print("No")
            break


    elif i % 2 == 1:
        if s[i] == "L" or s[i] == "U" or s[i] == "D":
            i += 1
        else:
            print("No")
            break

if i == n:
    print("Yes")
else:
    None
Buggy code:
s = list(input())
n = len(s)
#print(n)
k,g=[],[]
for i in range(n):
    if i%2==0:
        k.append(s[i])
    else:
        g.append(s[i])
#print(k)
#print(g)
for j in k:
    if j == 'L':
        print('No')
        break

else:
    for l in g:
        if l == 'R':
            print('No')
            break
        else:
            print('Yes')
            break
    


Fixed code:
s = list(input())
n = len(s)
#print(n)
k,g=[],[]
for i in range(n):
    if i%2==0:
        k.append(s[i])
    else:
        g.append(s[i])
#print(k)
#print(g)
for j in k:
    if j == 'L':
        print('No')
        break

else:
    for l in g:
        if l == 'R':
            print('No')
            break
    else:
        print('Yes')
Buggy code:
# https://atcoder.jp/contests/abc141/tasks/abc141_b
s = input()
sr = s[1::2].replace("R", "").replace("U", "").replace("D", "")
sl = s[::2].replace("L", "").replace("U", "").replace("D", "")
if sr and sl:
    print("Yes")
    exit()
print("No")


Fixed code:
# https://atcoder.jp/contests/abc141/tasks/abc141_b
s = input()
sr = s[::2].replace("R", "").replace("U", "").replace("D", "")
sl = s[1::2].replace("L", "").replace("U", "").replace("D", "")
if sr or sl:
    print("No")
    exit()
print("Yes")
Buggy code:
s = input()
#print(len(s))
ans = 0
for i in range(len(s)):
    #print(i)
    if i+1 %2==0:
        if s[i] == 'R':
            #print('g')
            ans = 1
    if i %2==1:
        if s[i]== 'L':
            #print('k')
            ans=1

if ans ==1:
    print('No')
if ans == 0:
    print('Yes')

Fixed code:
s = input()
ans = 0
for i in range(len(s)):
    #print(i)
    if i %2==0:
        if s[i] == 'L':
            #print('g')
            ans = 1
    if i %2==1:
        if s[i]== 'R':
            #print('k')
            ans=1

if ans ==1:
    print('No')
if ans == 0:
    print('Yes')
Buggy code:
S = input()

even = set(S[1::2])
odd = set(S[::2])


if "R" not in even:
    if "L" not in odd:
        print("Yes")
    else:
        print("No")



Fixed code:
S = input()

even = set(S[1::2])
odd = set(S[::2])


if "R" not in even:
    if "L" not in odd:
        print("Yes")
    else:
        print("No")
else:
    print("No")
Buggy code:
a=input()
if a%2==0:
  for i in range(int(len(a)/2)):
    if a[2*i]=="R" or a[2*i]=="U" or a[2*i]=="D":
      b=b+1
    if a[2*i+1]=="L" or a[2*i+1]=="U" or a[2*i+1]=="D":
      b=b+1
  if b=len(a):
    print("Yes")
  else:
    print("No")
if a%2==1:
  for i in range(int(len(a)/2)+1):
    if a[2*i]=="R" or a[2*i]=="U" or a[2*i]=="D":
      b=b+1
  for i in range(int(len(a)/2)):
    if a[2*i+1]=="L" or a[2*i+1]=="U" or a[2*i+1]=="D":
      b=b+1
  if b=len(a):
    print("Yes")
  else:
    print("No")

Fixed code:
a=input()
b=0
if (len(a))%2==0:
  for i in range(int(len(a)/2)):
    if a[2*i]=="R" or a[2*i]=="U" or a[2*i]=="D":
      b=b+1
    if a[2*i+1]=="L" or a[2*i+1]=="U" or a[2*i+1]=="D":
      b=b+1
  if b==len(a):
    print("Yes")
  else:
    print("No")
if (len(a))%2==1:
  for i in range(int(len(a)/2)+1):
    if a[2*i]=="R" or a[2*i]=="U" or a[2*i]=="D":
      b=b+1
  for i in range(int(len(a)/2)):
    if a[2*i+1]=="L" or a[2*i+1]=="U" or a[2*i+1]=="D":
      b=b+1
  if b==len(a):
    print("Yes")
  else:
    print("No")
Buggy code:
import re
s = input()
odd = s[::2]
eve = s[1::2]
odd_re = re.compile{^[RUD]*$}
eve_re = re.compile{^[LUD]*$}
if odd_re.findall(odd) != [] and eve_re.findall(eve) != []:
    print("Yes")
else:
    print("No")

Fixed code:
import re
s = input()
odd = s[::2]
eve = s[1::2]
odd_re = re.compile(r"^[RUD]*$")
eve_re = re.compile(r"^[LUD]*$")
if odd_re.findall(odd) != [] and eve_re.findall(eve) != []:
    print("Yes")
else:
    print("No")
Buggy code:
s=input()
l=len(s)
flag=True
for i in range(l):
  if i%2==0:
    if s[i]=='R':
      flag=False
  else:
    if s[i]=='L':
      flag=False
if flag==True:
  print('Yes')
else:
  print('No')

Fixed code:
s=input()
l=len(s)
flag=True
for i in range(l):
  if i%2==0:
    if s[i]=='L':
      flag=False
  else:
    if s[i]=='R':
      flag=False
if flag==True:
  print('Yes')
else:
  print('No')
Buggy code:
S = input()
s = list()
for a in S:
    s.append(a)

even = s[1::2]
odd = s[0::2]

if 'L' in even and 'R' in odd:
    print('Yes')
else:
    print('No')

Fixed code:
S = input()
s = list()
for a in S:
    s.append(a)

even = s[1::2]
odd = s[0::2]

if 'R' not in even and 'L' not in odd:
    print('Yes')
else:
    print('No')
Buggy code:
S = input()
index = 0
for n in S:
  if index % 2 == 0:
    if n == "R" or n == "U" or n == "D":
      pass
    else:
      print("No")
      exit()
  else:
    if n == "L" or n == "U" or n == "D":
      pass
    else:
      print("No")
      exit()
print("Yes")

Fixed code:
S = input()
index = 0
for n in S:
  if index % 2 == 0:
    if n == "R" or n == "U" or n == "D":
      pass
    else:
      print("No")
      exit()
  else:
    if n == "L" or n == "U" or n == "D":
      pass
    else:
      print("No")
      exit()
  index += 1
print("Yes")
Buggy code:
x = list(input())
i = 0
while i < len(x) - 1:
    if  i % 2 == 0:
        if x[i] in ["L", "U", "D"]:
            edetector = True 
        else:
            edetector = False
    else:
        if x[i] in ["R", "U", "D"]:
            odetector = True 
        else:
            odetector = False
    i += 1
if edetector and odetector:
    print("Yes")
else:
    print("No")


Fixed code:
x = list(input())
i = 0
edetector = True
odetector = True
while i < len(x):
    if  i % 2 == 0:
        if not x[i] in ["R", "U", "D"]:
            edetector = False
    else:
        if not x[i] in ["L", "U", "D"]:
            odetector = False
    i += 1

if edetector and odetector:
    print("Yes")
else:
    print("No")
Buggy code:
s = input()

for i in range(s.len()):
  if (i % 2 == 0 and s[i] == 'L') or (i % 2 == 1 and s[i] == 'R'):
    print("No")
    exit()

print("Yes")

Fixed code:
s = input()
 
for i in range(len(s)):
  if (i % 2 == 0 and s[i] == 'L') or (i % 2 == 1 and s[i] == 'R'):
    print("No")
    exit()

print("Yes")
Buggy code:
str = input()
num = len(str)
ans = True
for i in range(num):
    print(str[i])
    if (i+1) % 2 == 0:
        if str[i] == "R":
            ans = False
    else:
        if str[i] == "L":
            ans = False

if ans:
    print("Yes")
else:
    print("No")

Fixed code:
str = input()
num = len(str)
ans = True
for i in range(num):
    if (i+1) % 2 == 0:
        if str[i] == "R":
            ans = False
    else:
        if str[i] == "L":
            ans = False

if ans:
    print("Yes")
else:
    print("No")
Buggy code:
s = input()

odd  = [ (c in 'RUD') for i, c in enumerate(s) if i % 2 == 1 ]
even = [ (c in 'LUD') for i, c in enumerate(s) if i % 2 == 0 ]

if all(odd) and all(even):
  print('Yes')
else:
  print('No')

Fixed code:
s = input()

odd  = [ (c in 'RUD') for i, c in enumerate(s) if i % 2 == 0 ]
even = [ (c in 'LUD') for i, c in enumerate(s) if i % 2 == 1 ]

if all(odd) and all(even):
  print('Yes')
else:
  print('No')
Buggy code:
if __name__ == "__main__":
  inputstr = input()
  size = len(inputstr)

  isEasy = True

  for i in range(size):
    if i % 2 == 0:
      if inputstr[i] in ["L", "U", "D"]:
        pass
      else:
        isEasy = False
        break
    else:
      if inputstr[i] in ["R", "U", "D"]:
        pass
      else:
        isEasy = False
        break

  if isEasy == True:
    print("Yes")
  else:
    print("No")


Fixed code:
if __name__ == "__main__":
  inputstr = input()
  size = len(inputstr)
  isEasy = True

  for i in range(size):
    point = i + 1
    if point % 2 == 0:
      if inputstr[i] in ["L", "U", "D"]:
        pass
      else:
        isEasy = False
        break
    else:
      if inputstr[i] in ["R", "U", "D"]:
        pass
      else:
        isEasy = False
        break

  if isEasy == True:
    print("Yes")
  else:
    print("No")
Buggy code:
x = input()
count = 0
for i in range(len(x)):
  if i % 2 == 0:
    if x[i] == "R" || x[i] == "U" || x[i] == "D":
      count += 1
    else:
      print("No")
      break
  if i % 2 == 1:
    if x[i] == "L" || x[i] == "U" || x[i] == "D":
      count += 1
    else:
      print("No")
      break
if count == len(x):
  print("Yes")

Fixed code:
x = input()
count = 0
for i in range(len(x)):
  if i % 2 == 0:
    if x[i] == "R" or x[i] == "U" or x[i] == "D":
      count += 1
    else:
      print("No")
      break
  if i % 2 == 1:
    if x[i] == "L" or x[i] == "U" or x[i] == "D":
      count += 1
    else:
      print("No")
      break
if count == len(x):
  print("Yes")
Buggy code:
s = list(input())

k = sorted(set(s[0::2]))
g = sorted(set(s[1::2]))

if 'R' in k and 'L' in g:
    print('Yes')
else:
    print('No')

Fixed code:
s = list(input())

k = sorted(set(s[0::2]))
g = sorted(set(s[1::2]))

if 'L' in k or 'R' in g:
    print('No')
else:
    print('Yes')
Buggy code:
S = input()

print("Yes" if ('R' not in S[0::2] and 'L' not in S[1::2]) else "No")

Fixed code:
S = input()

print("Yes" if ('L' not in S[0::2] and 'R' not in S[1::2]) else "No")
Buggy code:
import sys

t = input()

t2 = t[0::2]
t1 = t[1::2]

if "L" in t1:
  if "R" in t2:
    print("Yes")
  else:
    print("No")
else:
  print("No")

Fixed code:
import sys
 
t = input()
 
t1 = t[0::2]
t2 = t[1::2]
if "L" in t1:
  print("No")
else:
  if "R" in t2:
    print("No")
  else:
    print("Yes")
Buggy code:
S = input()
for i,s in enumerate(S):
  if (i%2 == 0)&(s=='L'):
    print('No')
    break
  elif (i%2 == 1)&(s=='R'):
    print('No')
    break
  else:
    print('Yes')

Fixed code:
S = input()
flag = 'Yes'
for i,s in enumerate(S):
  if (i%2 == 0)&(s=='L'):
    flag = 'No'
    break
  elif (i%2 == 1)&(s=='R'):
    flag = 'No'
    break
  else:
    flag = 'Yes'
    continue

print(flag)
Buggy code:
S = input()

odd = S[::2]
even = [1::2]

if 'L' in odd or 'R' in even:
    print('No')
else:
    print('Yes')

Fixed code:
S = input()

odd = S[::2]
even = S[1::2]

if 'L' in odd or 'R' in even:
    print('No')
else:
    print('Yes')
Buggy code:
s = input()

od = ["R","U","D"]
ev = ["L","U","D"]

b = False
for i in range(len(s)):
  if i%2==0 and (s[i] not in ev):
      b = True
      break
  elif i%2==1 and (s[i] not in od):
      b = True
      break

if b:
  print("No")
else:
  print("Yes")

Fixed code:
s = input()

od = ["R","U","D"]
ev = ["L","U","D"]

b = False
for i in range(len(s)):
  if i%2==1 and (s[i] not in ev):
      b = True
      break
  elif i%2==0 and (s[i] not in od):
      b = True
      break

if b:
  print("No")
else:
  print("Yes")
Buggy code:
import numpy

S = input()
isContinue = True

for i in range(0, len(S), 2):
    if isContinue and S[i] not in ['R', 'U', 'D']:
        print('No')
        isContinue = False

for i in range(1, len(S), 2):
    if isContinue and S[i] not in ['L', 'U', 'D']:
        print('No')
        isContinue = False

if isContinue:
    print('YesDULL')


Fixed code:
import numpy

S = input()
isContinue = True

for i in range(0, len(S), 2):
    if isContinue and S[i] not in ['R', 'U', 'D']:
        print('No')
        isContinue = False

for i in range(1, len(S), 2):
    if isContinue and S[i] not in ['L', 'U', 'D']:
        print('No')
        isContinue = False

if isContinue:
    print('Yes')
Buggy code:
s=input()
ki=s[1::2]
gu=s[::2]
if 'L' in ki:
    print('No')
elif 'R' in gu:
    print('No')
else:
    print('Yes')


Fixed code:
s=input()
ki=s[2::2]
gu=s[1::2]
ki=s[0]+ki
if 'L' in ki:
    print('No')
elif 'R' in gu:
    print('No')
else:
    print('Yes')
Buggy code:
s = input()

howmany = len(s)
judge = "Yes"

for x in range(howmany):
  if x % 2 == 0:
    if s[x] != "L" and s[x] != "U" and s[x] != "D":
      judge = "No"
      break
  else:
    if s[x] != "R" and s[x] != "U" and s[x] != "D":
      judge = "No"
      break
      
print(judge)
      

Fixed code:
s = input()

howmany = len(s)
judge = "Yes"

for x in range(howmany):
  if x % 2 == 0:
    if s[x] != "R" and s[x] != "U" and s[x] != "D":
      judge = "No"
      break
  else:
    if s[x] != "L" and s[x] != "U" and s[x] != "D":
      judge = "No"
      break
      
print(judge)
Buggy code:
S = input()
if 'L' in S[::2] and 'R' in S[1::2]:
    print('No')
else:
    print('Yes')


Fixed code:
S = input()
if not 'L' in S[::2] and not 'R' in S[1::2]:
    print('Yes')
else:
    print('No')
Buggy code:
line=input()

a=['R','U','D']
b=['L','U','D']
flag=True

for i in range(len(line)):
  if (i+1)%2==1:
    if line[i] not in a:
      flag==False
      print('No')
      break
  else:
    if line[i] not in b:
      flag==False
      print('No')
      break

if flag:
  print('Yes')

Fixed code:
line=input()

a=['R','U','D']
b=['L','U','D']
flag=True

for i in range(len(line)):
  if not flag:
    break
  if (i+1)%2==1:
    if line[i] not in a:
      flag=False
      print('No')
  else:
    if line[i] not in b:
      flag=False
      print('No')
if flag==True:
  print('Yes')
Buggy code:
s = input()
count = 1
for i in s:
    if (count % 2 == 1) and ( i == 'L'):
        flag = False
        count += 1
    elif (count % 2 == 0) and (i == 'R'):
        flag = False
        count += 1
    else:
        count += 1
if flag:
    print('Yes')
else:
    print('No')

Fixed code:
s = input()
flag = True
count = 1
for i in s:
    if (count % 2 == 1) and ( i == 'L'):
        flag = False
        count += 1
    elif (count % 2 == 0) and (i == 'R'):
        flag = False
        count += 1
    else:
        count += 1
if flag:
    print('Yes')
else:
    print('No')
Buggy code:
import Re
a=input()
b=re.compile('^([^L][^R]*[^L]?)$')
if a.match(b)
print('Yes')
else
print('No')

Fixed code:
import re
a = input()
b = re.compile('^([^L][^R])*[^L]?$')
if b.match(a):
	print('Yes')
else:
	print('No')