Buggy python submission (verdict: Runtime Error):
T = input()
lenT = len(T)
a = T.replace("eraser","xxxxxx")
b = a.replace("dreamer","xxxxxxx")
c = b.replace("erase","xxxxx")
d = c.replace("dream","xxxxx")
D = d.count("x")
if D == lenT:
  print("YES")
else D < lenT:
  print("NO")

Fixed submission:
S=str(input()) #Sの入力
Smojisuu=len(S)
c=S.count("eraser")
S=S.replace("eraser","xxxxxx",c)
d=S.count("erase")
S=S.replace("erase","xxxxx",d)
e=S.count("dreamer")
S=S.replace("dreamer","xxxxxxx",e)
f=S.count("dream")
S=S.replace("dream","xxxxx",f)
g=S.count("x")
if len(S)>g:
  print("NO")
elif len(S)==g:
  print("YES")
else:
  print("error")

Buggy python submission (verdict: Time Limit Exceeded):
T = input()
 
w0 = "dream"
w1 = "dreamer"
w2 = "erase"
w3 = "eraser"
 
dict_sen = {0:w0,1:w1,2:w2,3:w3}
 
dp = ""
FT = len(T)
F = 0
while(F < FT):
  for i in range(4):
    if T[F:F+len(dict_sen[i])] == dict_sen[i]:
      dp = dp + dict_sen[i]
      F = len(dp)
      break
 
if dp != T:
  print("NO")
else :
  print("YES")

Fixed submission:
S=str(input()) #Sの入力
Smojisuu=len(S)
c=S.count("eraser")
S=S.replace("eraser","xxxxxx",c)
d=S.count("erase")
S=S.replace("erase","xxxxx",d)
e=S.count("dreamer")
S=S.replace("dreamer","xxxxxxx",e)
f=S.count("dream")
S=S.replace("dream","xxxxx",f)
g=S.count("x")
if len(S)>g:
  print("NO")
elif len(S)==g:
  print("YES")
else:
  print("error")

Buggy python submission (verdict: Runtime Error):
T = input()
 
w0 = "dream"
w1 = "dreamer"
w2 = "erase"
w3 = "eraser"
 
dict_sen = {0:w0,1:w1,2:w2,3:w3}
 
dp = ""
cnt = 0
cnt1= 0
F = 0
while(cnt < time2):
  cnt += 1
  for i in range(4):
    if T[F:F+len(dict_sen[i])] == dict_sen[i]:
      dp.extend(dict_sen[i])
      F = len(dp)
      cnt1 += 1
      break
 
if dp != T:
  print("NO")
else :
  print("YES")

Fixed submission:
S=str(input()) #Sの入力
Smojisuu=len(S)
c=S.count("eraser")
S=S.replace("eraser","xxxxxx",c)
d=S.count("erase")
S=S.replace("erase","xxxxx",d)
e=S.count("dreamer")
S=S.replace("dreamer","xxxxxxx",e)
f=S.count("dream")
S=S.replace("dream","xxxxx",f)
g=S.count("x")
if len(S)>g:
  print("NO")
elif len(S)==g:
  print("YES")
else:
  print("error")

Buggy python submission (verdict: Runtime Error):
T = input()
 
w0 = "dream"
w1 = "dreamer"
w2 = "erase"
w3 = "eraser"
 
dict_sen = {0:w0,1:w1,2:w2,3:w3}
 
dp = ""
cnt = 0
cnt1= 0
time = ceil(len(T)/5)
time2 = floor(len(T)/7)

while(cnt < time):
  cnt += 1
  for i in range(4):
    if T[:len(dict_sen[i])] == dict_sen[i]:
      T = T[len(dict_sen[i]):]
      cnt1 += 1
      break

if cnt1 < time2:
  print("NO")
else :
  print("YES")

Fixed submission:
S=str(input()) #Sの入力
Smojisuu=len(S)
c=S.count("eraser")
S=S.replace("eraser","xxxxxx",c)
d=S.count("erase")
S=S.replace("erase","xxxxx",d)
e=S.count("dreamer")
S=S.replace("dreamer","xxxxxxx",e)
f=S.count("dream")
S=S.replace("dream","xxxxx",f)
g=S.count("x")
if len(S)>g:
  print("NO")
elif len(S)==g:
  print("YES")
else:
  print("error")

Buggy python submission (verdict: Time Limit Exceeded):
T = input()
 
w0 = "dream"
w1 = "dreamer"
w2 = "erase"
w3 = "eraser"
 
dict_sen = {0:w0,1:w1,2:w2,3:w3}
 
dp = ""
 
while(len(dp) < len(T)):
  for i in range(4):
    if T[:len(dict_sen[i])] == dict_sen[i]:
      T = T[len(dict_sen):]
      dp = dp + dict_sen[i]
      break
if dp == T :
  print("YES")
else :
  print("NO")

Fixed submission:
S=str(input()) #Sの入力
Smojisuu=len(S)
c=S.count("eraser")
S=S.replace("eraser","xxxxxx",c)
d=S.count("erase")
S=S.replace("erase","xxxxx",d)
e=S.count("dreamer")
S=S.replace("dreamer","xxxxxxx",e)
f=S.count("dream")
S=S.replace("dream","xxxxx",f)
g=S.count("x")
if len(S)>g:
  print("NO")
elif len(S)==g:
  print("YES")
else:
  print("error")

Buggy python submission (verdict: Time Limit Exceeded):
T = input()
 
w0 = "dream"
w1 = "dreamer"
w2 = "erase"
w3 = "eraser"
 
dict_sen = {0:w0,1:w1,2:w2,3:w3}
 
dp = ""
 
while(len(dp) < len(T)):
  for i in range(4):
    if T[len(dp):len(dp)+len(dict_sen[i])] == dict_sen[i]:
      dp = dp + dict_sen[i]
      break
if dp == T :
  print("YES")
else :
  print("NO")

Fixed submission:
S=str(input()) #Sの入力
Smojisuu=len(S)
c=S.count("eraser")
S=S.replace("eraser","xxxxxx",c)
d=S.count("erase")
S=S.replace("erase","xxxxx",d)
e=S.count("dreamer")
S=S.replace("dreamer","xxxxxxx",e)
f=S.count("dream")
S=S.replace("dream","xxxxx",f)
g=S.count("x")
if len(S)>g:
  print("NO")
elif len(S)==g:
  print("YES")
else:
  print("error")

Buggy python submission (verdict: Time Limit Exceeded):
T = input()

w0 = "dream"
w1 = "dreamer"
w2 = "erase"
w3 = "eraser"

dict_sen = {0:w0,1:w1,2:w2,3:w3}

dp = ""
S = ""

while(len(dp) < len(T)):
  for i in range(4):
    S = dict_sen[i]
    if T[len(dp):len(dp)+len(S)] == S:
      dp = dp + S
      break
if dp == T :
  print("YES")
else :
  print("NO")

Fixed submission:
S=str(input()) #Sの入力
Smojisuu=len(S)
c=S.count("eraser")
S=S.replace("eraser","xxxxxx",c)
d=S.count("erase")
S=S.replace("erase","xxxxx",d)
e=S.count("dreamer")
S=S.replace("dreamer","xxxxxxx",e)
f=S.count("dream")
S=S.replace("dream","xxxxx",f)
g=S.count("x")
if len(S)>g:
  print("NO")
elif len(S)==g:
  print("YES")
else:
  print("error")