qyliang/CodeNanoFix huggingface dataset:
Buggy code:
S=input()
list_A=[]
for letter in S:
    list_A.append(letter)
list_B=list_A[0::2]
list_C=list_A[1::2]
b=0
c=0
for letter2 in list_B:
    if letter2=='R'or letter2=='U'or letter2=='D':
        b+=1
for letter3 in list_C:
    if letter3=='L'or letter2=='U'or letter2=='D':
        c+=1
if b==len(list_B)and c==len(list_C):
        print('Yes')
else:
    print('No')

Fixed code:
S=input()
list_A=[]
for letter in S:
    list_A.append(letter)
list_B=list_A[0::2]
list_C=list_A[1::2]
b=0
c=0
for letter2 in list_B:
    if letter2=='R'or letter2=='U'or letter2=='D':
        b+=1
for letter3 in list_C:
    if letter3=='L'or letter3=='U'or letter3=='D':
        c+=1
if b==len(list_B)and c==len(list_C):
        print('Yes')
else:
    print('No')
Buggy code:
a=input()

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


Fixed code:
a=input()

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

print("Yes")
Buggy code:
s = input()
ans = "Yes"
for i in range(1, len(s)+1):
    if i % 2 == 0:
        if "" == s[i-1]:
            ans = "No"
    else:
        if "L" == s[i-1]:
            ans = "No"
print(ans)


Fixed code:
s = input()
ans = "Yes"
for i in range(1, len(s)+1):
    if i % 2 == 0:
        if "R" == s[i-1]:
            ans = "No"
    else:
        if "L" == s[i-1]:
            ans = "No"
print(ans)
Buggy code:
odd='RUD'
even='LUD'
s=int(input())
flag=0
for i in range(len(s)):
  a=i+1
  if a%2==0:
    if s[i] not in even:
      flag=1
      break
  else:
    if s[i] not in odd:
      flag=1
      break
if flag==1:
  print ('No')
else:
  print ('Yes')

Fixed code:
odd='RUD'
even='LUD'
s=input()
flag=0
for i in range(len(s)):
  a=i+1
  if a%2==0:
    if s[i] not in even:
      flag=1
      break
  else:
    if s[i] not in odd:
      flag=1
      break
if flag==1:
  print ('No')
else:
  print ('Yes')
Buggy code:
import sys

s = list(input())

for i in range(len(s)):
  if i % 2 == 1:
    if s[i] == "R" or s[i] == "U"or s[i] == "D":
      continue
    else:
      print("No")
      sys.exit()
  else:
    if s[i] == "L" or s[i] == "U"or s[i] == "D":
      continue
    else:
      print("No")
      sys.exit()

print("Yes")

Fixed code:
import sys

s = list(input())

for i in range(len(s)):
  if i % 2 == 1:
    if s[i] == "L" or s[i] == "U"or s[i] == "D":
      continue
    else:
      print("No")
      sys.exit()
  else:
    if s[i] == "R" or s[i] == "U"or s[i] == "D":
      continue
    else:
      print("No")
      sys.exit()

print("Yes")
Buggy code:
S = input()

S = np.array( [S[i] for i in range(len(S))] )

if (S[0::2]=='L').any():
  print('No')
elif (S[1::2]=='R').any():
  print('No')
else:
  print('Yes')

Fixed code:
import numpy as np

S = input()
 
S = np.array( [S[i] for i in range(len(S))] )
 
if (S[0::2]=='L').any():
  print('No')
elif (S[1::2]=='R').any():
  print('No')
else:
  print('Yes')
Buggy code:
S = input()

even = set({})
odd = set({})
for i in range(len(S)):
    if i % 2 == 0:
        even.add(S[i])
    else:
        odd.add(S[i])
print(even, odd)

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

Fixed code:
S = input()

even = set({})
odd = set({})
for i in range(len(S)):
    if i % 2 == 0:
        even.add(S[i])
    else:
        odd.add(S[i])
#print(even, odd)

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

Dance = input()
i = 0
flag = 0
for char in Dance:
  if i%2 == 0:
    if char == R:
      flag = 1
      break
  else:
    if char == L:
      flag = 1
      break
  i+=1
  
if flag == 0:
  print("Yes")
else:
  print("No")

Fixed code:
Dance = input()
i = 0
flag = 0
for char in Dance:
  if i%2 == 1:
    if char == "R":
      flag = 1
      break
  else:
    if char == "L":
      flag = 1
      break
  i+=1
  
if flag == 0:
  print("Yes")
else:
  print("No")
Buggy code:
from heapq import heappush, heappop
from collections import deque,defaultdict,Counter
import itertools
from itertools import permutations,combinations
import sys
import bisect
import string
import math
import time
import random
def I():
    return int(input())
def MI():
    return map(int,input().split())
def LI():
    return [int(i) for i in input().split()]
def LI_():
    return [int(i)-1 for i in input().split()]
def show(*inp,end='\n'):
    if show_flg:
        print(*inp,end=end)
YN=['Yes','No']
mo=10**9+7
ts=time.time()
sys.setrecursionlimit(10**6)
input=sys.stdin.readline
show_flg=False
show_flg=True

an=0
k=0
s=list(input())
n=len(s)
d=[['R','U','D'],['L','U','D']]
for i in range(n):
    if s[i] in d[k]:
        0
    else:
        an=1
    k=1-k
    
print(YN[an])


Fixed code:
from heapq import heappush, heappop
from collections import deque,defaultdict,Counter
import itertools
from itertools import permutations,combinations
import sys
import bisect
import string
import math
import time
import random
def I():
    return int(input())
def MI():
    return map(int,input().split())
def LI():
    return [int(i) for i in input().split()]
def LI_():
    return [int(i)-1 for i in input().split()]
def show(*inp,end='\n'):
    if show_flg:
        print(*inp,end=end)
YN=['Yes','No']
mo=10**9+7
ts=time.time()
sys.setrecursionlimit(10**6)
#input=sys.stdin.readline
show_flg=False
#show_flg=True

an=0
k=0
s=list(input())
n=len(s)
d=[['R','U','D'],['L','U','D']]
show(d[0],d[1])
for i in range(n):
    if s[i] in d[k]:
        show('OK')
    else:
        show('NG')
        an=1
    k=1-k
    
print(YN[an])
Buggy code:
def main():
    s = input()
    nagasa = len(s)

    for i in range(nagasa):
        if i % 2 != 0 and s[i] == "L":
            print("No")
            exit()
        elif i % 2 == 0 and s[i] == "R":
            print("No")
            exit()
    print("Yes")

    
    
    
if __name__ == "__main__":
    main()


Fixed code:
def main():
    s = input()
    nagasa = len(s)

    for i in range(nagasa):
        if i % 2 == 0 and s[i] == "L":
            print("No")
            exit()
        elif i % 2 != 0 and s[i] == "R":
            print("No")
            exit()
    print("Yes")

    
    
    
if __name__ == "__main__":
    main()
Buggy code:
n= list(input())
print('No' if 'L' in n[::2] or 'R' in n[1::2] else 'Yes)


Fixed code:
S = list(input())
print('No' if 'L' in S[::2] or 'R' in S[1::2] else 'Yes')
Buggy code:
S = input()
for i in range(len(S)):
  if i%2==1:
    if S[i] in ['R', 'U', 'D']:
      continue
    else:
      print('No')
      break
  else:
    if S[i] in ['L', 'U', 'D']:
      continue
    else:
      print('No')
      break
else:
  print('Yes')

Fixed code:
S = input()
for i in range(len(S)):
  if i%2==0:
    if S[i] in ['R', 'U', 'D']:
      continue
    else:
      print('No')
      break
  else:
    if S[i] in ['L', 'U', 'D']:
      continue
    else:
      print('No')
      break
else:
  print('Yes')
Buggy code:
s = input()
ans = "YES"
for i, char in enumerate(s):
    if i % 2 == 1:
        if char == "R":
            ans = "No"
    else:
        if char == "L":
            ans = "No"

print(ans)

Fixed code:
s = input()
ans = "Yes"
for i, char in enumerate(s):
    if i % 2 == 1:
        if char == "R":
            ans = "No"
    else:
        if char == "L":
            ans = "No"

print(ans)
Buggy code:
s=str(input())
L = list(s)
count = 0
n = 0
for i in L:
  n += 1
  if n % 2 == 1:
    if i == "R":
      count += 1
  else:
    if i == "L":
      count += 1
if count == 0:
  print("Yes")
else:
  print("No")
    

Fixed code:
s=str(input())
L = list(s)
count = 0
n = 0
for i in L:
  n += 1
  if n % 2 == 0:
    if i == "R":
      count += 1
  else:
    if i == "L":
      count += 1
if count == 0:
  print("Yes")
else:
  print("No")
Buggy code:
S = input()
S1 = S[::2]
S2 = S[1::2]
f1=S1.find('L')
f2=S2.find('R')
print(f1,f2)
if (f1==-1) and (f2==-1): print("Yes")
else:print("No")


Fixed code:
S = input()
S1 = S[::2]
S2 = S[1::2]
f1=S1.find('L')
f2=S2.find('R')
if (f1==-1) and (f2==-1): print("Yes")
else:print("No")
Buggy code:
s = input()
for i in range(len(s)):
  cur = "Yes"
  if i % 2 == 0:
    if s[i] == "L":
      cur = "No"
  else:
    if s[i] != "R":
      cur = "No"
print(cur)

Fixed code:
s = input()
cur = "Yes"
for i in range(len(s)):
  if i % 2 == 0:
    if s[i] == "L":
      cur = "No"
  else:
    if s[i] == "R":
      cur = "No"
print(cur)
Buggy code:
s = input()
is_ok = True
for i in range(len(s)):
    if i % 2 == 0 and s[i] == "L":
        is_ok = False
        break
    if i % 2 == 1 and s[i] == "R":
        is_ok = False
        break
print("Yes" is_ok else "No")

Fixed code:
s = input()
is_ok = True
for i in range(len(s)):
    if i % 2 == 0 and s[i] == "L":
        is_ok = False
        break
    if i % 2 == 1 and s[i] == "R":
        is_ok = False
        break
print("Yes" if is_ok else "No")
Buggy code:
S=input()
flg=0
for i in range(len(S)):
    if i/2==0:
        if S[i]=="L":
            flg=1
            break
    else:
        if S[i]=="R":
            flg=1
            break

if flg==0:
    print("Yes")
else:
    print("No")

Fixed code:
S=input()
flg=0
for i in range(len(S)):
    if i%2==0:
        if S[i]=="L":
            flg=1
            break
    else:
        if S[i]=="R":
            flg=1
            break

if flg==0:
    print("Yes")
else:
    print("No")
Buggy code:
li = list(input())

lik = li[1::2]
lig = li[0::2]
a = 0
b = 0
if 'L' in lik:
    a = a + 1

if 'R' in lig:
    b = b + 1

if a + b == 0:
    print('Yes')
else:
    print('No')

Fixed code:
li = list(input())

lik = li[1::2]
lig = li[0::2]
a = 0
b = 0


if 'L' in lig:
    a = a + 1

if 'R' in lik:
    b = b + 1

if a + b == 0:
    print('Yes')
else:
    print('No')
Buggy code:
s=list(input())
l=len(s)
for i  in range(0,l):
  if i%2==0:
    if s[i]=="R":
      break
  if i%2==1:
    if s[i]=="L":
      break
  print("Yes")
print("No")

Fixed code:
s=list(input())
l=len(s)
for i  in range(0,l):
  if i%2==0:
    if s[i]=="L":
      print("No")
      exit()
  if i%2==1:
    if s[i]=="R":
      print("No")
      exit()
print("Yes")
Buggy code:
s=list(input())
l=len(s)
for i  in range(0,l):
  if i%2==0:
    if s[i]=="R":
      print("No")
      exit()
  if i%2==1:
    if s[i]=="L":
      print("No")
      exit()
print("Yes")

Fixed code:
s=list(input())
l=len(s)
for i  in range(0,l):
  if i%2==0:
    if s[i]=="L":
      print("No")
      exit()
  elif i%2==1:
    if s[i]=="R":
      print("No")
      exit()
  else:
    pass
print("Yes")
Buggy code:
S=input()

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

Fixed code:
S = list(input())
cnt = 0
for i in range(len(S)) :
    if(i % 2 == 0) :
        if(S[i] == "L") :
            break
        else :
            cnt += 1
    else :
        if(S[i] == "R") :
            break
        else :
            cnt += 1
    
if(cnt == len(S)) :
    print("Yes")
else :
    print("No")
Buggy code:
S=list(input())
even=[]
odd=[]
for i in range(len(S)):
    if i%2==0:
        even.append(S[i])
    else:
        odd.append(S[i])
print(odd,even)
if not "L" in even and not "R" in odd:
    print("Yes")
else:
    print("No")

Fixed code:
S=list(input())
even=[]
odd=[]
for i in range(len(S)):
    if i%2==0:
        even.append(S[i])
    else:
        odd.append(S[i])
if not "L" in even and not "R" in odd:
    print("Yes")
else:
    print("No")
Buggy code:
s=str(input())
hantei0=True
hantei1=True

for i in range(len(s)):
  if i%2==0 and s[i]=='L':
    print(i,s[i])
    hantei0=False
  elif i%2==1 and s[i]=='R':
    hantei1=False
    
if hantei0==True and hantei1==True:
  print('Yes')
else:
  print('No')

Fixed code:
s=str(input())
hantei0=True
hantei1=True

for i in range(len(s)):
  if i%2==0 and s[i]=='L':
    hantei0=False
  elif i%2==1 and s[i]=='R':
    hantei1=False
    
if hantei0==True and hantei1==True:
  print('Yes')
else:
  print('No')
Buggy code:
s = input()
count = 0
for i in range(len(s)):
    if (i+1) % 2 != 0 and s[i] != 'R' and s[i] != 'U' and s[i] != 'D':
        count += 1
    elif (i+1) % 2 == 0 and s[i] != 'L' and s[i] != 'U' and s[i] != 'D':
        count += 1
    else:
        break
if count == 0:
    print('Yes')
else:
    print('No') 

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

e=0
for x in range(0, len(s)):
  if x%2==0 and s[x] == 'R':
    e = 1

o=0
for y in range(0, len(s)):
  if y%2!=0 and s[y] == 'L':
    o = 1
    
if e==1 or o==1:
  print('No')

else:
  print('Yes')


Fixed code:
s = input()

e=0
for x in range(0, len(s)):
  if x%2==0 and s[x] == 'L':
    e = 1

o=0
for y in range(0, len(s)):
  if y%2!=0 and s[y] == 'R':
    o = 1
    
if e==1 or o==1:
  print('No')

else:
  print('Yes')
Buggy code:
from sys import stdin
S = (stdin.readline().rstrip())
if (set(S[0::2]) <= {"L","U","D"}) and  (set(S[1::2]) <= {"L","U","D"}):
    print("Yes")
else:
    print("No")

Fixed code:
from sys import stdin
S = (stdin.readline().rstrip())

if (set(S[0::2]) <= {"R","U","D"}) and  (set(S[1::2]) <= {"L","U","D"}):
    print("Yes")
else:
    print("No")
Buggy code:
s = input()
for i, c in enumerate(s):
    if i % 2 == 0 and c == 'R':
        yes = False
    elif i % 2 == 1 and c == 'L':
        yes = False
if yes:
    print('Yes')
else:
    print('No')
    


Fixed code:
s = input()
yes = True
for i, c in enumerate(s):
    if i % 2 == 1 and c == 'R':
        #print(i)
        yes = False
    elif i % 2 == 0 and c == 'L':
        yes = False
        #print(i)
if yes:
    print('Yes')
else:
    print('No')
Buggy code:
S = input()

string = list(S)
judge = True

for i in range(1,len(string)+1):
    if string[i-1] == 'U' or string[i-1] == 'D':
        pass
    elif string[i-1] == 'L' and i % 2 == 0:
        pass
    elif string[i-1] == 'R' and i % 2 == 1:
        pass
    elif string[i-1] == 'R' and i == 1:
        pass
    else:
        judge = False
        print(string[i-1] + ':' + str(i))

if judge == True:
    print('Yes')
elif judge == False:
    print('No')

Fixed code:
S = input()

string = list(S)
judge = True

for i in range(1,len(string)+1):
    if string[i-1] == 'U' or string[i-1] == 'D':
        pass
    elif string[i-1] == 'L' and i % 2 == 0:
        pass
    elif string[i-1] == 'R' and i % 2 == 1:
        pass
    elif string[i-1] == 'R' and i == 1:
        pass
    else:
        judge = False
if judge == True:
    print('Yes')
elif judge == False:
    print('No')
Buggy code:
text = list(input())

text_1, text_2 = list(text), list(text)
for i in range(int(len(text)/2)):
    text_1.pop(i)
    text_2.pop(i+1)
str_1, str_2 = "", ""
for i in range(len(text_1)):
    str_1 += text_1[i]
for i in range(len(text_2)):
    str_2 += text_2[i]

if str_1.find('L') == -1 and str_2.find('R') == -1:
    print('Yes')
else:
    print('No')

Fixed code:
text = list(input())

text_1, text_2 = list(text), list(text)
for i in range(int(len(text)/2)):
    text_1.pop(i)
    text_2.pop(i+1)
if len(text) % 2 == 1:
    text_1.pop(len(text_1)-1)

str_1, str_2 = "", ""
for i in range(len(text_1)):
    str_1 += str(text_1[i])
for i in range(len(text_2)):
    str_2 += str(text_2[i])

if str_2.find('L') == -1 and str_1.find('R') == -1:
    print('Yes')
else:
    print('No')
Buggy code:
from sys import stdin

char = stdin.readline().rstrip()

for i,c in enumerate(char):
    if i %2 ==0:
        if c not in ("R",'U','D'):
            print('no')
            break
    else:
        if c not in ("L",'U','D'):
            print('no')
            break
else:
    print('Yes')

Fixed code:
from sys import stdin

char = stdin.readline().rstrip()

for i,c in enumerate(char):
    if i %2 ==0:
        if c not in ("R",'U','D'):
            print('No')
            break
    else:
        if c not in ("L",'U','D'):
            print('No')
            break
else:
    print('Yes')
Buggy code:
def func():
    S = input()

    ans = 'Yes'
    for i in range(len(S)):
        if i % 2 != 0 and S[i] == 'R':
            ans = 'No'
            break

        elif S[i] == 'L':
            ans = 'No'
            break
    
    print(ans)

if __name__ == '__main__':
    func()


Fixed code:
def func():
    S = input()

    ans = 'Yes'
    for i in range(len(S)):
        if (i+1) % 2 != 0 and S[i] == 'L':
            ans = 'No'
            break

        if (i+1) % 2 == 0 and S[i] == 'R':
            ans = 'No'
            break
    
    print(ans)

if __name__ == '__main__':
    func()
Buggy code:
import sys


def LI(): return [int(x) for x in sys.stdin.readline().split()]


def I(): return int(sys.stdin.readline())


def S():
    res = list(sys.stdin.readline())
    if res[-1] == "\n":
        return res[:-1]
    return res


# A
def A():
    s = input()
    if s == "Sunny":
        print("Cloudy")
    elif s == "Cloudy":
        print("Rainy")
    else:
        print("Sunny")
    return


# B
def B():
    s = S()
    for i in range(len(s))
        if i % 2:
            if s[i] not in ["L", "U", "D"]:
                print("No")
                return
        else:
            if s[i] not in ["R", "U", "D"]:
                print("No")
                return
    print("Yes")
    return


# C
def C():
    return


# D
def D():
    return


# E
def E():
    return


# F
def F():
    return


# Unittest
def resolve():
    B()
    return


# Solve
if __name__ == "__main__":
    B()


Fixed code:
import sys


def LI(): return [int(x) for x in sys.stdin.readline().split()]


def I(): return int(sys.stdin.readline())


def S():
    res = list(sys.stdin.readline())
    if res[-1] == "\n":
        return res[:-1]
    return res


# A
def A():
    s = input()
    if s == "Sunny":
        print("Cloudy")
    elif s == "Cloudy":
        print("Rainy")
    else:
        print("Sunny")
    return


# B
def B():
    s = S()
    for i in range(len(s)):
        if i % 2:
            if s[i] not in ["L", "U", "D"]:
                print("No")
                return
        else:
            if s[i] not in ["R", "U", "D"]:
                print("No")
                return
    print("Yes")
    return


# C
def C():
    return


# D
def D():
    return


# E
def E():
    return


# F
def F():
    return


# Unittest
def resolve():
    B()
    return


# Solve
if __name__ == "__main__":
    B()
Buggy code:
s = input()
sl = list(s)
for i in range(len(sl)):
    if i % 2 == 1:
        if sl[i] == 'L':
            print('No')
            break
        else:
            continue
    else:
        if sl[i] == 'R':
            print('No')
            break
        else:
            continue
else:
    print('Yes')

Fixed code:
s = input()
sl = list(s)
for i in range(len(sl)):
    if (i + 1) % 2 == 1:
        if sl[i] == 'L':
            print('No')
            break
        else:
            continue
    else:
        if sl[i] == 'R':
            print('No')
            break
        else:
            continue
else:
    print('Yes')
Buggy code:
s = list(input())
n = len(s)
k = ['R','U','D']
g = ['L','U','D']

for i in range(n):
    if i % 2 ==0:
        if s[i] in k:
            count +=1
    else:
        if s[i] in g:
            count += 1
       
if count == n:
    print("Yes")
else:
    print("No")

Fixed code:
s = list(input())
n = len(s)
k = ['R','U','D']
g = ['L','U','D']
count =0

for i in range(n):
    if i % 2 ==0:
        if s[i] in k:
            count +=1
    else:
        if s[i] in g:
            count += 1
       
if count == n:
    print("Yes")
else:
    print("No")
Buggy code:
s = list(input())
flg=0
for i in range(0,len(s)-2,2):
    if s[i]  not in ["R","U","D"]:
        flg=1
    if s[i+1] not in ["L","U","D"]:
        flg=1

if(flg==1):
    print("No")
else: print("Yes")

Fixed code:
s = list(input())
flg=0
for i in range(1,len(s)+1):
    if(i%2!=0):
        if s[i-1] not in ["R","U","D"]:
            flg=1
    elif(i%2==0):
        if s[i-1] not in ["L","U","D"]:
            flg=1
if(flg==1):
    print("No")
else: print("Yes")
Buggy code:
#<B>
S = input()
S1 = S[0::2]
S2 = S[1::2]
ans1 = S1.count("R") + S1.count("U") + S2.count("D")
ans2 = S2.count("L") + S2.count("U") + S2.count("D")
if ans1 == len(S1) and ans2 == len(S2):
    print("Yes")
else:
    print("No")

Fixed code:
#<B>
S = input()
S1 = S[0::2]
S2 = S[1::2]
ans1 = S1.count("R") + S1.count("U") + S1.count("D")
ans2 = S2.count("L") + S2.count("U") + S2.count("D")
if ans1 == len(S1) and ans2 == len(S2):
    print("Yes")
else:
    print("No")
Buggy code:
s = list(input())
for i in range(len(s)):
  if i % 2 == 0:
    if not s[i] in "RUD":
      print ("No") 
      exit() 
  else: 
    if nit s[i] in "LUD":
      print("No")
      exit()
print("Yes"

Fixed code:
s = list(input())
for i in range(len(s)):
  if i % 2 == 0:
    if not s[i] in "RUD":
      print ("No") 
      exit() 
  else: 
    if not s[i] in "LUD":
      print("No")
      exit()
print("Yes")
Buggy code:
S = input().strip()

odd_set = set(["R", "U", "D"])
even_set = set(["L", "U", "D"])

flag = True
for i,s in enumerate(S):
  if((i+1)%2 == 0):
    if(s not in odd_set):
      flag = False
      break
  else:
    if(s not in even_set):
      flag = False
      break
if(flag):
  print("Yes")
else:
  print("No")
      

Fixed code:
S = input().strip()

odd_set = set(["R", "U", "D"])
even_set = set(["L", "U", "D"])

flag = True
for i,s in enumerate(S):
  if((i+1)%2 == 1):
    if(s not in odd_set):
      flag = False
      break
  else:
    if(s not in even_set):
      flag = False
      break
if(flag):
  print("Yes")
else:
  print("No")
Buggy code:
s=input()
if s[0::2]=='L' or s[1::2]=='R':
  print('No')
else('Yes')

Fixed code:
s=input()
if 'L' in s[0::2] or 'R' in s[1::2]:
  print('No')
else:
  print('Yes')
Buggy code:
s = input()
j = 'Yes'
for i in range(len(s)):
  if (s[i] == 'U') or (s[i] == 'D'):
    continue
  if (s[i] % 2) == 0:
    if (s[i] == 'L'):
      continue
    else:
      j = 'No'
      break
  if (s[i] % 2) == 1:
    if (s[i] == 'R'):
      continue
    else:
      j = 'No'
      break
print(j)

Fixed code:
s = input()
j = 'Yes'
for i in range(len(s)):
  if (s[i] == 'U') or (s[i] == 'D'):
    continue
  if (i % 2) == 0:
    if (s[i] == 'R'):
      continue
    else:
      j = 'No'
      break
  if (i % 2) == 1:
    if (s[i] == 'L'):
      continue
    else:
      j = 'No'
      break
print(j)
Buggy code:
S = list(input())
i = 0
for s in range(len(S)):
  t = s + 1
  if S[s] == "U" or S[s] =="D":
    i += 1
  if t%2 !=0 :
    if S[s] == "R":
      i +=1
  if t%2==0:
    if S[s] == "L":
      i += 1
print(i)
if i == len(S):
  print("Yes")
else:
  print("No")

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

for i in range(0, n, 2):
    if s[i] == 'L':
        print('No')
        exit()

for i in range(1, n, 2):
    if s[i] == 'R':
        print('No')

print('Yes')


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

for i in range(0, n, 2):
    if s[i] == 'L':
        print('No')
        exit()

for i in range(1, n, 2):
    if s[i] == 'R':
        print('No')
        exit()

print('Yes')
Buggy code:
s=input()
i=0
for tmp in list(s):
  i+=1
  if i%2==0:
    if tmp in ['L','U','D']:
      continue
    else:
      x='N'
      break
  else:
    if tmp in ['R','U','D']:
      continue
    else:
      x='N'
      break
  break
if x=='N':
    print('No')
else:
    print('Yes')

Fixed code:
s=input()
i=0
for tmp in list(s):
  i+=1
  if i%2==0:
    if tmp in ['L','U','D']:
      x='Y'  
      continue
    else:
      x='N'
      break
  else:
    if tmp in ['R','U','D']:
      x='Y'  
      continue
    else:
      x='N'
      break
  break
if x=='N':
    print('No')
else:
    print('Yes')