qyliang/CodeNanoFix huggingface dataset:
Buggy code:
import re;
s = input();
print("Yes" if re.fullmatch(r'^(dream|dreamer|eraser|erase)*$', s) else "NO")


Fixed code:
import re;
s = input();
print("YES" if re.fullmatch(r'^(dream|dreamer|eraser|erase)*$', s) else "NO")
Buggy code:
S=input().replace("dream","").replace("dreamer","").replace("erase","").replace("eraser","")
if S=="":
	print("YES")
else:
	print("NO")

Fixed code:
S=input()
 
S=S.replace('eraser','')
S=S.replace('erase','')
S=S.replace('dreamer','')
S=S.replace('dream','')
 
if S=='':
    print('YES')
else:
    print('NO')
Buggy code:
A = input()
A = A[::-1]
divide = [i[::-1] for i  in ["dream", "dreamer", "erase", "eraser"]]
print(A)
print(divide)
flag = 1
while flag and A:
  flag = 0
  for word in divide:
    if A.startswith(word):
      A = A[len(word):]
      print(A)
      flag = 1

if len(A) == 0:
  print('YES')
else:
  print('NO')


Fixed code:
A = input()
A = A[::-1]
divide = [i[::-1] for i  in ["dream", "dreamer", "erase", "eraser"]]

flag = 1
while flag and A:
  flag = 0
  for word in divide:
    if A.startswith(word):
      A = A[len(word):]
      flag = 1

if len(A) == 0:
  print('YES')
else:
  print('NO')
Buggy code:
init = input()

words = [
  'dream',
  'dreamer',
  'erase',
  'eraser'
]

def reverseWord(str):
  return str[::-1]

def elimTheWord(str):
  for word in reversed_words:
    if str.find(word) == 0:
      str = str[len(word):]
  return str

reversed_words = list(map(reverseWord, words))

# main
target = reverseWord(init)

while True:
  pivot = elimTheWord(target)
  if pivot == '':
    print('Yes')
    break
  if pivot == target:
    print('No')
    break
  target = pivot

Fixed code:
init = input()

words = [
  'dream',
  'dreamer',
  'erase',
  'eraser'
]

def reverseWord(str):
  return str[::-1]

def elimTheWord(str):
  for word in reversed_words:
    if str.find(word) == 0:
      str = str[len(word):]
  return str

reversed_words = list(map(reverseWord, words))

# main
target = reverseWord(init)

while True:
  pivot = elimTheWord(target)
  if pivot == '':
    print('YES')
    break
  if pivot == target:
    print('NO')
    break
  target = pivot
Buggy code:
def resolve():
	s = input()
	if re.search("^(dream|dreamer|erase|eraser)+$", s):
		print("YES")
	else:
		print("NO")
resolve()

Fixed code:
import re
def resolve():
	s = input()
	if re.search("^(dream|dreamer|erase|eraser)+$", s):
		print("YES")
	else:
		print("NO")
resolve()
Buggy code:
import sys

#+++++
		
def main():
	s = input()
	ww=['dream','dreamer','erase','eraser']
	
	s=s[::-1]
	wwr=[w[::-1] for w in ww]
	#print(wwrs)
	while len(s)>0:
		pa(s)
		is_ok=False
		for w in wwr:
			ll=len(w)
			ss=s[:ll]
			pa((2,ss,w))
			if ss == w:
				is_ok=True
				pa((1,ss,ll))
				s=s[ll:]
		if not is_ok:
			return 'No'		
		
	print('Yes')
	
	
#+++++
isTest=False

def pa(v):
	if isTest:
		print(v)

if __name__ == "__main__":
	if sys.platform =='ios':
		sys.stdin=open('inputFile.txt')
		isTest=True
	else:
		pass
		#input = sys.stdin.readline
			
	ret = main()
	if ret is not None:
		print(ret)

Fixed code:
import sys

#+++++
		
def main():
	s = input()
	ww=['dream','dreamer','erase','eraser']
	
	s=s[::-1]
	wwr=[w[::-1] for w in ww]
	#print(wwrs)
	while len(s)>0:
		#pa(s)
		is_ok=False
		for w in wwr:
			ll=len(w)
			ss=s[:ll]
			#pa((2,ss,w))
			if ss == w:
				is_ok=True
				#pa((1,ss,ll))
				s=s[ll:]
		if not is_ok:
			print('NO')
			return 
		
	print('YES')
	
	
#+++++
isTest=False

def pa(v):
	if isTest:
		print(v)

if __name__ == "__main__":
	if sys.platform =='ios':
		sys.stdin=open('inputFile.txt')
		isTest=True
	else:
		pass
		#input = sys.stdin.readline
			
	ret = main()
	if ret is not None:
		print(ret)
Buggy code:
s=input()

s=s.replace('dreamerase','')
s=s.replace('dreamer','')
s=s.replace('dream','')
s=s.replace('eraser','')
s=s.replace('erase','')

if s=='':
  print('YES')

else:
  print('NO')

Fixed code:
s=input()
s=s.replace("eraser","")
s=s.replace("erase","")
s=s.replace("dreamer","")
s=s.replace("dream","")
if s=="":print("YES")
else:print("NO")
Buggy code:
s = input()
sr = s[::-1]
w = ["maerd","remaerd","esare","resare"]
for i in range(4):
    sr = sr.replace(w[i],"")
if sr == "":print("YES")
else:print("NO")

Fixed code:
s = input()
sr = s[::-1]
w = ["resare","esare","remaerd","maerd"]
for i in range(4):
    sr = sr.replace(w[i],"")
if sr == "":print("YES")
else:print("NO")
Buggy code:
S = input()
length_substring_S = len(S)
test_str_list = ['dream', 'dreamer', 'erase', 'eraser']
flag = True

while flag == True:
  for i in range(len(test_str_list)):
    if S[0:length_substring_S].endswith(test_str_list[i]):
      length_substring_S -= len(test_str_list[i])
      flag = True
      break
  flag = False

if length_substring_S == 0:
  print('YES')
else:
  print('NO')

Fixed code:
S = input()
length_substring_S = len(S)
test_str_list = ['dream', 'dreamer', 'erase', 'eraser']
flag = True

while flag == True:
  flag = False
  for i in range(len(test_str_list)):
    if S[0:length_substring_S].endswith(test_str_list[i]):
      length_substring_S -= len(test_str_list[i])
      flag = True
      break

if length_substring_S == 0:
  print('YES')
else:
  print('NO')
Buggy code:
s = input()

while len(s) > 4:
    if s[-5:] == 'deram' or s[-5:] == 'erase':
        s = s[:-5]
        continue
    elif s[-6:] == 'eraser':
        s = s[:-6]
        continue
    elif s[-7:] == 'dreamer':
        s = s[:-7]
        continue
    else:
        break
        
if len(s) == 0:
    print('YES')
else:
    print('NO')
    

Fixed code:
s = input()

while len(s) > 4:
    if s[-5:] == 'dream' or s[-5:] == 'erase':
        s = s[:-5]
        continue
    elif s[-6:] == 'eraser':
        s = s[:-6]
        continue
    elif s[-7:] == 'dreamer':
        s = s[:-7]
        continue
    else:
        break
        
if len(s) == 0:
    print('YES')
else:
    print('NO')
Buggy code:
s = input()[::-1]
ls = ['dream', 'dreamer', 'erase', 'eraser']
ls = [ls[i][::-1] for i in range(4)]

ans = 'YES'
i = 0
while i < len(s):
    ng = 1
    for j in range(4):
        if s[i:i+len(ls[j])] == ls[j]:
            i += len(ls[j])
            ng = 0
    if ng:
        ans = 'No'
        break
print(ans)

Fixed code:
s = input()[::-1]
ls = ['dream', 'dreamer', 'erase', 'eraser']
ls = [ls[i][::-1] for i in range(4)]
ans = 'YES'
i = 0
while i < len(s):
    ng = 1
    for j in range(4):
        if s[i:i+len(ls[j])] == ls[j]:
            i += len(ls[j])
            ng = 0
    if ng:
        ans = 'NO'
        break
print(ans)
Buggy code:
import sys

s = input()
s = s[::-1]

d ='maerd'
dr = 'remaerd'
e = 'esare'
er = 'resare'

i = 0
while True:
    try:
        if s[i:i+5] == d or s[i:i+5] == e:
            i += 5
            if i == len(s):
                print('YES')
                sys.exit(0)
        
        elif s[i:i+7] == dr or s[i:i+7]:
            i += 7
            if i == len(s):
                print('YES')
                sys.exit(0)
            
        else:
            print('NO')
            sys.exit(0)
            
    except Exception as err:
        print('NO')
        sys.exit(0)

Fixed code:
import sys

s = input()
s = s[::-1]

d ='maerd'
dr = 'remaerd'
e = 'esare'
er = 'resare'

i = 0
while True:
    try:
        if s[i:i+5] == d or s[i:i+5] == e:
            i += 5
            if i == len(s):
                print('YES')
                sys.exit(0)
        
        elif s[i:i+6] == er:
            i += 6
            if i == len(s):
                print('YES')
                sys.exit(0)
        
        elif s[i:i+7] == dr:
            i += 7
            if i == len(s):
                print('YES')
                sys.exit(0)
            
        else:
            print('NO')
            sys.exit(0)
            
    except Exception as err:
        print('NO')
        sys.exit(0)
Buggy code:
S = input()
for k in range(len(S)/5):
    for word in ["dream", "dreamer", "erase", "eraser"]:
        if S.endswith(word):
            S=S.rstrip(word)
if len(S)==0:
    print("YES")
else:
    print("NO")

Fixed code:
S = input()
for k in range(int(len(S)/5)):
    for word in ["dream", "dreamer", "erase", "eraser"]:
        if S.endswith(word):
            S=S[:-len(word)]
if len(S)==0:
    print("YES")
else:
    print("NO")
Buggy code:
S = input()
N = ["dream", "dreamer", "erase", "eraser"]
bool = True

while bool:
  if len(S) == 0:
    break
 
  bool = False
  for n in N:
    
    if S.endswith(n):
      L = S.rsplit(n,1)
      S = L[0]
      print(S)
      bool = True
      break
  

if bool:
  print("YES")
else:
  print("NO")
 

Fixed code:
S = input()
N = ["dream", "dreamer", "erase", "eraser"]
bool = True

while bool:
  if len(S) == 0:
    break
 
  bool = False
  for n in N:
    
    if S.endswith(n):
      L = S.rsplit(n,1)
      S = L[0]
      bool = True
      break
  

if bool:
  print("YES")
else:
  print("NO")
Buggy code:
import sys
# input = sys.stdin.readline
sys.setrecursionlimit(10 ** 9)
MOD = 10 ** 9 + 7

S = list(input())
i = len(S) - 1

T = ['dream', 'dreamer', 'erase', 'eraser']

while i > 0:
    if S[i] == 'm':
        for j in range(5):
            if S[i - j] == T[0][4 - j]:
                continue
            else:
                print ('NO')
                exit()
        i -= 5
    elif S[i] == 'r':
        if S[i - 2] == 'm':
            for j in range(7):
                if S[i - j] == T[1][6 - j]:
                    continue
                else:
                    print ('NO')
                    exit()
            i -= 7
        else:
            for j in range(6):
                if S[i - j] == T[3][5 - j]:
                    continue
                else:
                    print ('NO')
                    exit()
            i -= 6
    else:
        for j in range(5):
            if S[i - j] == T[2][4 - j]:
                continue
            else:
                print ('NO')
                exit()
        i -= 5

if i == -1:
    print ('Yes')
else:
    print ('No')

Fixed code:
import sys
# input = sys.stdin.readline
sys.setrecursionlimit(10 ** 9)
MOD = 10 ** 9 + 7

S = list(input())
i = len(S) - 1

T = ['dream', 'dreamer', 'erase', 'eraser']

while i > 0:
    if S[i] == 'm':
        for j in range(5):
            if S[i - j] == T[0][4 - j]:
                continue
            else:
                print ('NO')
                exit()
        i -= 5
    elif S[i] == 'r':
        if S[i - 2] == 'm':
            for j in range(7):
                if S[i - j] == T[1][6 - j]:
                    continue
                else:
                    print ('NO')
                    exit()
            i -= 7
        else:
            for j in range(6):
                if S[i - j] == T[3][5 - j]:
                    continue
                else:
                    print ('NO')
                    exit()
            i -= 6
    else:
        for j in range(5):
            if S[i - j] == T[2][4 - j]:
                continue
            else:
                print ('NO')
                exit()
        i -= 5

if i == -1:
    print ('YES')
else:
    print ('NO')
Buggy code:
S = input()

T = ["dream", "dreamer", "erase", "eraser"]

S = S[::-1]
for i in range(4):
    T[i] = T[i][::-1]

can = True
i = 0
while i < len(S):
    can2 = False
    for t in T:
        if S[i:i + len(t)] == t:
            can2 = True
            i += len(t)
    if can2 == False:
        can = False
        break
    i += 1

if can:
    print("YES")
else:
    print("NO")


Fixed code:
S = input()

T = ["dream", "dreamer", "erase", "eraser"]

S = S[::-1]
for i in range(4):
    T[i] = T[i][::-1]

can = True
i = 0
while i < len(S):
    can2 = False
    for t in T:
        if S[i:i + len(t)] == t:
            can2 = True
            i += len(t) - 1
    if can2 == False:
        can = False
        break
    i += 1

if can:
    print("YES")
else:
    print("NO")
Buggy code:
creds = [i for i in ['dreamer', 'eraser', 'dream', 'erase']]
s = input()
t = ""
index = 0
done_ = False
while len(s) != 0:
    done = False
    for cred in creds:
        if s.startswith(cred):
            s = s[len(cred):]
            done = True
            continue
    if not done:
        done_ = True
        break


if not done_:
    print("YES")
else:
    print("NO")


Fixed code:
creds = [i[::-1] for i in ['dreamer', 'eraser', 'dream', 'erase']]
s = input()[::-1]
t = ""
index = 0
done_ = False
while len(s) != 0:
    done = False
    for cred in creds:
        if s.startswith(cred):
            s = s[len(cred):]
            done = True
            continue
    if not done:
        done_ = True
        break


if not done_:
    print("YES")
else:
    print("NO")
Buggy code:
s = list(input())
while s:
    if ''.join(s[:5]) == 'erase' or ''.join(s[:5]) == 'dream':
        for i in range(5):
            s.pop(0)
    elif ''.join(s[:6]) == 'eraser':
        for i in range(6):
            s.pop(0)
    elif ''.join(s[:7]) == 'dreamer':
        for i in range(7):
            s.pop(0)
    else:
        print('NO')
        exit()
    
    if len(s) == 0:
        print('YES')
        exit()


Fixed code:
s = list(input())
while s:
    if ''.join(s[-5:]) == 'erase' or ''.join(s[-5:]) == 'dream':
        for i in range(5):
            s.pop()
    elif ''.join(s[-6:]) == 'eraser':
        for i in range(6):
            s.pop()
    elif ''.join(s[-7:]) == 'dreamer':
        for i in range(7):
            s.pop()
    else:
        print('NO')
        exit()
    
    if len(s) == 0:
        print('YES')
        exit()
Buggy code:
s = input()
s = s[::-1]
n = len(s)

cur = 0
while cur < n:

  if s[cur:cur+5:] == "maerd" or "esare":
    cur += 5
    continue
  if s[cur:cur+6:] == "resare":
    cur += 6
    continue
  if s[cur:cur+7:] == "remaerd":
    cur += 7
    continue
  print("NO")
  exit()

print("YES")

Fixed code:
s = input()
s = s[::-1]
n = len(s)

cur = 0
while cur < n:
  if s[cur:cur+5:] == "maerd" or s[cur:cur+5:] == "esare":
    cur += 5
    continue
  elif s[cur:cur+6:] == "resare":
    cur += 6
    continue
  elif s[cur:cur+7:] == "remaerd":
    cur += 7
    continue
  print("NO")
  exit()
print("YES")
Buggy code:
S = list(input())
N = len(S)
c = 0
dream = list("dream")
dreamer = list("dreamer")
erase = list("erase")
eraser = list("eraser")
while True:
    if S[c:c + 5] == dream:
        c += 5
        if S[c:c + 5] != erase and S[c:c + 2] == list("er"):
            c += 2
        if c == N:
            print("YES")
            break
    elif S[c:c + 5] == erase:
        c += 5
        if S[c:c + 1] == "r":
            c += 1
        if c == N:
            print("YES")
    else:
        print("NO")
        break

Fixed code:
S = list(input())
N = len(S)
c = 0
dream = list("dream")
dreamer = list("dreamer")
erase = list("erase")
eraser = list("eraser")
while True:
    if S[c:c + 5] == dream:
        c += 5
        if S[c:c + 5] != erase and S[c:c + 2] == list("er"):
            c += 2
        if c == N:
            print("YES")
            break
    elif S[c:c + 5] == erase:
        c += 5
        if S[c:c + 1] == ["r"]:
            c += 1
        if c == N:
            print("YES")
            break
    else:
        print("NO")
        break
Buggy code:
s = input()

s = s.replace('erase', '')
s = s.replace('eraser', '')
s = s.replace('dream', '')
s = s.replace('dreamer', '')

if s == '':
    print('YES')
else:
    print('NO')


Fixed code:
s = input()
 
s = s.replace('eraser', '')
s = s.replace('erase', '')
s = s.replace('dreamer', '')
s = s.replace('dream', '')
 
if s == "":
    print("YES")
else:
    print("NO")
Buggy code:
t=input()
trigger=1
key=''
d=-1
app=['dreamer','eraser','dream','erase']
while len(t)>0 and trigger:
    for i in range(4):
        key=app[i]
        if key==t[:len(key)]:
            t=t[len(key):]
            trigger+=1
            d=i
            break
    trigger-=1
    if trigger==0 and d==0 and t[:3]=='ase':
        t='er'+t
        trigger+=1
if t=='':
    print('YES')
else:
    print('NO')
    print(t)

Fixed code:
t=input()
trigger=1
key=''
d=-1
app=['dreamer','eraser','dream','erase']
while len(t)>0 and trigger:
    for i in range(4):
        key=app[i]
        if key==t[:len(key)]:
            t=t[len(key):]
            trigger+=1
            d=i
            break
    trigger-=1
    if trigger==0 and d==0 and t[:3]=='ase':
        t='er'+t
        trigger+=1
if t=='':
    print('YES')
else:
    print('NO')
Buggy code:
if __name__ == '__main__':
    L = ['dream', 'dreamer', 'erase', 'eraser']
    S = input()
    n = len(S)

    while True:
        if S[-7:] == 'dreamer' or S[-7:] == 'eraser':
            n -= 7
            S = S[:-7]
        elif S[-5:] == 'dream' or S[-5:] == 'erase':
            n -= 5
            S = S[:-5]
        else:
            break
    if len(S) == -1:
        print('YES')
    else:
        print('NO')


Fixed code:
if __name__ == '__main__':
    L = ['dream', 'dreamer', 'erase', 'eraser']
    S = input()
    n = len(S)

    while True:
        if S[-7:] == 'dreamer':
            n -= 7
            S = S[:-7]
        elif S[-6:] == 'eraser':
            n -= 6
            S = S[:-6]
        elif S[-5:] == 'dream' or S[-5:] == 'erase':
            n -= 5
            S = S[:-5]
        else:
            break
    if len(S) == 0:
        print('YES')
    else:
        print('NO')
Buggy code:
S = input()[::-1]
T = ['maerd' ,'remaerd' ,'esare' ,'resare']
i, j = 0, 0
while True:
    if i == 4:
        break
    if T[i] == S[j:j+len(T[i])]:
        p += len(T[i])
        i = 0
    else:
        i += 1
print("YES" if len(S)==j else "NO")

Fixed code:
S = input()[::-1]
T = ['maerd' ,'remaerd' ,'esare' ,'resare']
i, j = 0, 0
while True:
    if i == 4:
        break
    if T[i] == S[j:j+len(T[i])]:
        j += len(T[i])
        i = 0
    else:
        i += 1
print("YES" if len(S)==j else "NO")
Buggy code:
S = input()
S = S[::-1]

divide = ["esare","resare","maerd","remaerd"]
hantei = False
i = 0

while i < len(S):
    for j in range(len(divide)):
        if (len(S[j:]) >= len(divide[j])) and (S[i:i+len(divide[j])] == divide[j]):
            i += len(divide[j])
            break
    else:
         break
else:
    hantei = True

if hantei:
    print("YES")
else:
    print("No")


Fixed code:
S = input()
S = S[::-1]

divide = ["esare","resare","maerd","remaerd"]
hantei = False
i = 0

while i < len(S):
    for j in range(len(divide)):
        if (len(S[j:]) >= len(divide[j])) and (S[i:i+len(divide[j])] == divide[j]):
            i += len(divide[j])
            break
    else:
         break
else:
    hantei = True

if hantei:
    print("YES")
else:
    print("NO")
Buggy code:
import re
s=input()
if re.search(r"(dreamer|dream|erase|eraser)*",s):
    print("YES")
else:
    print("NO")

Fixed code:
import re
s=input()
if re.search(r"^(dreamer|dream|erase|eraser)*$",s):
    print("YES")
else:
    print("NO")
Buggy code:
import re
S = input()
S = re.sub(r'dream(er)?', '', S)
S = re.sub(r'erase(r)?', '',S)
if S == '':
    print('YES')
else:
    print('NO')

Fixed code:
import re
S = input()
S = re.sub(r'erase(r)?', '',S)
S = re.sub(r'dream(er)?', '', S)

if S == '':
    print('YES')
else:
    print('NO')
Buggy code:
s = input()

kouho = ["dream", "dreamer", "erase", "eraser"]

s.replace(kouho[0], "").replace(kouho[1], "").replace(kouho[2], "").replace(kouho[3], "")

if s == "":
    print("YES")
else:
    print("NO")

Fixed code:
s = input()
 
kouho = ["dream", "dreamer", "erase", "eraser"]
 
s = s.replace(kouho[3], "").replace(kouho[2], "").replace(kouho[1], "").replace(kouho[0], "")
 
if s == "":
    print("YES")
else:
    print("NO")
Buggy code:
S = input().strip()
#-----

i=0
while i <= len(S)-5:

    if S[i:(i+7)] == "dreamer":
        i=i+7
    elif S[i:(i+6)] == "eraser":
        i=i+6
    elif S[i:(i+5)] == "dream" or S[i:(i+5)] == "erase":
        i=i+5
    else:
        print("NO")
        break

print("YES")

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

i=len(S)
while i >= 0:

    if S[(i-7):i] == "dreamer":
        i=i-7
    elif S[(i-6):i] == "eraser":
        i=i-6
    elif S[(i-5):i] == "dream" or S[(i-5):i] == "erase":
        i=i-5
    else:
        print("NO")
        break

    if i == 0:
        print("YES")
        break
Buggy code:
S = input()
S = S.replace('dreamer','')
S = S.replace('eraser','')
S = S.replace('dream','')
S = S.replace('erase','')
if len(S)==0:
    print('YES')
else:
    print('NO')

Fixed code:
S=input().replace("eraser","").replace("erase","").replace("dreamer","").replace("dream","")
if S:
    print("NO")
else:
    print("YES")
Buggy code:
s = input()[::-1]
while True:
    end_flg = False
    if s[:5] == "maerd":
        s = s.replace("maerd", "", 1)
        end_flg = True
        print(s)
    elif s[:5] == "esare":
        s = s.replace("esare", "", 1)
        end_flg = True
    elif s[:7] == "remaerd":
        s = s.replace("remaerd", "", 1)
        end_flg = True
    elif s[:6] == "resare":
        s = s.replace("resare", "", 1)
        end_flg = True    

    if end_flg == False:
        break
        
if s == "":
    print("YES")
else:
    print("NO")

Fixed code:
s = input()[::-1]
while True:
    end_flg = False
    if s[:5] == "maerd":
        s = s.replace("maerd", "", 1)
        end_flg = True
    elif s[:5] == "esare":
        s = s.replace("esare", "", 1)
        end_flg = True
    elif s[:7] == "remaerd":
        s = s.replace("remaerd", "", 1)
        end_flg = True
    elif s[:6] == "resare":
        s = s.replace("resare", "", 1)
        end_flg = True    

    if end_flg == False:
        break
        
if s == "":
    print("YES")
else:
    print("NO")