Buggy python submission (verdict: Time Limit Exceeded):
s = list(input())
s.reverse()

while len(s) >= 5:
    if s[:5] == list("maerd"):
        del s[:5]
        continue
    if s[:7] == list("remaerd"):
        del s[:7]
        continue
    if s[:5] == list("esare"):
        del s[:5]
        continue
    if s[:6] == list("resare"):
        del s[:6]
        continue
    break

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

Fixed submission:
a = list(input())
 
while len(a) >= 5:
    if a[-5:] == list('dream'):
        del a[-5:]
        continue
    if a[-7:] == list('dreamer'):
        del a[-7:]
        continue
    if a[-5:] == list('erase'):
        del a[-5:]
        continue
    if a[-6:] == list('eraser'):
        del a[-6:]
        continue
    break
 
if a == []:
    print('YES')
else:
    print('NO')

Buggy python submission (verdict: Time Limit Exceeded):
s = list(input())
s.reverse()

while len(s):
    if s[:5] == list("maerd"):
        del s[:5]
        continue
    if s[:7] == list("remaerd"):
        del s[:7]
        continue
    if s[:5] == list("esare"):
        del s[:5]
        continue
    if s[:6] == list("resare"):
        del s[:6]
        continue
    break

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

Fixed submission:
a = list(input())
 
while len(a) >= 5:
    if a[-5:] == list('dream'):
        del a[-5:]
        continue
    if a[-7:] == list('dreamer'):
        del a[-7:]
        continue
    if a[-5:] == list('erase'):
        del a[-5:]
        continue
    if a[-6:] == list('eraser'):
        del a[-6:]
        continue
    break
 
if a == []:
    print('YES')
else:
    print('NO')

Buggy python submission (verdict: Time Limit Exceeded):
s = list(input())
s.reverse()

while s:
    if s[:5] == list("maerd"):
        del s[:5]
        continue
    if s[:7] == list("remaerd"):
        del s[:7]
        continue
    if s[:5] == list("esare"):
        del s[:5]
        continue
    if s[:6] == list("resare"):
        del s[:6]
        continue
    break

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

Fixed submission:
a = list(input())
 
while len(a) >= 5:
    if a[-5:] == list('dream'):
        del a[-5:]
        continue
    if a[-7:] == list('dreamer'):
        del a[-7:]
        continue
    if a[-5:] == list('erase'):
        del a[-5:]
        continue
    if a[-6:] == list('eraser'):
        del a[-6:]
        continue
    break
 
if a == []:
    print('YES')
else:
    print('NO')

Buggy python submission (verdict: Time Limit Exceeded):
s = list(input())
s.reverse()

while s:
    if s[:5] == list("maerd"):
        del s[:5]
        continue
    elif s[:7] == list("remaerd"):
        del s[:7]
        continue
    elif s[:5] == list("esare"):
        del s[:5]
        continue
    elif s[:6] == list("resare"):
        del s[:6]
        continue
    else:
        break

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

Fixed submission:
a = list(input())
 
while len(a) >= 5:
    if a[-5:] == list('dream'):
        del a[-5:]
        continue
    if a[-7:] == list('dreamer'):
        del a[-7:]
        continue
    if a[-5:] == list('erase'):
        del a[-5:]
        continue
    if a[-6:] == list('eraser'):
        del a[-6:]
        continue
    break
 
if a == []:
    print('YES')
else:
    print('NO')

Buggy python submission (verdict: Time Limit Exceeded):
S = list(input())
S.reverse()
def check(s):
    if s[:5] == list("maerd"):
        del s[:5]
        return True
    elif s[:7] == list("remaerd"):
        del s[:7]
        return True
    elif s[:5] == list("esare"):
        del s[:5]
        return True
    elif s[:6] == list("resare"):
        del s[:6]
        return True
    else:
        return False

while check(S):
    c = 0

if S == []:
    print("YES")
else:
    print("NO")

Fixed submission:
a = list(input())
 
while len(a) >= 5:
    if a[-5:] == list('dream'):
        del a[-5:]
        continue
    if a[-7:] == list('dreamer'):
        del a[-7:]
        continue
    if a[-5:] == list('erase'):
        del a[-5:]
        continue
    if a[-6:] == list('eraser'):
        del a[-6:]
        continue
    break
 
if a == []:
    print('YES')
else:
    print('NO')

Buggy python submission (verdict: Time Limit Exceeded):
S = list(input())
S.reverse()
def check(s):
    if s[:5] == ["m","a","e","r","d"]:
        del s[:5]
        return True
    elif s[:7] == ["r","e","m","a","e","r","d"]:
        del s[:7]
        return True
    elif s[:5] == ["e","s","a","r","e"]:
        del s[:5]
        return True
    elif s[:6] == ["r","e","s","a","r","e"]:
        del s[:6]
        return True
    else:
        return False

while check(S):
    c = 0

if S == []:
    print("YES")
else:
    print("NO")

Fixed submission:
a = list(input())
 
while len(a) >= 5:
    if a[-5:] == list('dream'):
        del a[-5:]
        continue
    if a[-7:] == list('dreamer'):
        del a[-7:]
        continue
    if a[-5:] == list('erase'):
        del a[-5:]
        continue
    if a[-6:] == list('eraser'):
        del a[-6:]
        continue
    break
 
if a == []:
    print('YES')
else:
    print('NO')