Buggy python submission (verdict: Time Limit Exceeded):
from collections import deque
A = deque(input())
while len(A) >= 2:
    if len(A) >= 5 and list(A)[-5:] == list("dream"):
        for _ in range(5):
            A.pop()
    elif len(A) >= 5 and list(A)[-5:] == list("erase"):
        for _ in range(5):
            A.pop()
    elif len(A) >= 6 and list(A)[-6:] == list("eraser"):
        for _ in range(6):
            A.pop()
    elif len(A) >= 7 and list(A)[-7:] == list("dreamer"):
        for _ in range(7):
            A.pop()
    else:
        A = deque([0])
if len(A) == 0:
    print("YES")
else:
    print("NO")


Fixed submission:
s = input().replace("eraser", "").replace("erase", "")
s = s.replace("dreamer", "").replace("dream", "")
if s:
    print("NO")
else:
    print("YES")

Buggy python submission (verdict: Runtime Error):
from collections import deque
A = deque(input())
while len(A) >= 2:
    if list(A)[-5:] == list("dream") or list("erase"):
        for _ in range(5):
            A.pop()
    elif list(A)[-6:] == list("eraser"):
        for _ in range(6):
            A.pop()
    elif list(A)[-7:] == list("dreamer"):
        for _ in range(7):
            A.pop()
    else:
        A = deque([0])
if len(A) == 0:
    print("YES")
else:
    print("NO")


Fixed submission:
s = input().replace("eraser", "").replace("erase", "")
s = s.replace("dreamer", "").replace("dream", "")
if s:
    print("NO")
else:
    print("YES")

Buggy python submission (verdict: Time Limit Exceeded):
from collections import deque
A = deque(input())
while len(A) >= 2:
    if list(A)[:5] == list("dream"):
        if list(A)[5:7] == list("er") and list(A)[7:8] != list("a"):
            for _ in range(7):
                A.popleft()
        else:
            for _ in range(5):
                A.popleft()
    elif list(A)[:5] == list("erase"):
        if list(A)[5:6] == list("r"):
            for _ in range(6):
                A.popleft()
        else:
            for _ in range(5):
                A.popleft()
    else:
        A = deque([0])
if len(A) == 0:
    print("YES")
else:
    print("NO")


Fixed submission:
s = input().replace("eraser", "").replace("erase", "")
s = s.replace("dreamer", "").replace("dream", "")
if s:
    print("NO")
else:
    print("YES")

Buggy python submission (verdict: Time Limit Exceeded):
from collections import deque
A = deque(input())
while len(A) >= 2:
    if list(A)[:7] == list("dreamer") and list(A)[5:8] != list("era"):
        for _ in range(7):
            A.popleft()
    elif list(A)[:5] == list("dream"):
        for _ in range(5):
            A.popleft()
    elif list(A)[:6] == list("eraser"):
        for _ in range(6):
            A.popleft()
    elif list(A)[:5] == list("erase"):
        for _ in range(5):
            A.popleft()
    else:
        A = deque([0])
if len(A) == 0:
    print("YES")
else:
    print("NO")


Fixed submission:
s = input().replace("eraser", "").replace("erase", "")
s = s.replace("dreamer", "").replace("dream", "")
if s:
    print("NO")
else:
    print("YES")

Buggy python submission (verdict: Time Limit Exceeded):
from collections import deque
A = deque(input())
while A != deque() and A != deque([0]):
    if list(A)[:7] == list("dreamer") and list(A)[5:10] != list("erase"):
        for _ in range(7):
            A.popleft()
    elif list(A)[:5] == list("dream"):
        for _ in range(5):
            A.popleft()
    elif list(A)[:6] == list("eraser"):
        for _ in range(6):
            A.popleft()
    elif list(A)[:5] == list("erase"):
        for _ in range(5):
            A.popleft()
    else:
        A = deque([0])
if A == deque():
    print("YES")
else:
    print("NO")


Fixed submission:
s = input().replace("eraser", "").replace("erase", "")
s = s.replace("dreamer", "").replace("dream", "")
if s:
    print("NO")
else:
    print("YES")

Buggy python submission (verdict: Time Limit Exceeded):
from collections import deque
A = deque(input())
while A != deque() and A != deque([0]):
    if list(A)[:7] == list("dreamer") and list(A)[5:10] != list("erase"):
        for _ in range(7):
            A.popleft()
    elif list(A)[:5] == list("dream"):
        for _ in range(5):
            A.popleft()
    elif list(A)[:6] == list("eraser"):
        for _ in range(6):
            A.popleft()
    elif list(A)[:5] == list("erase"):
        for _ in range(5):
            A.popleft()
    else:
        A = deque([0])
if A == deque():
    print("YES")
else:
    print("NO")


Fixed submission:
s = input().replace("eraser", "").replace("erase", "")
s = s.replace("dreamer", "").replace("dream", "")
if s:
    print("NO")
else:
    print("YES")

Buggy python submission (verdict: Runtime Error):
from collections import deque
A = deque(input())
while A != deque() and A != deque([0]):
    if list(A)[:7] == list("dreamer") and list(A)[5:10] != list("erase"):
        for _ in range(7):
            A.leftpop()
    elif A[:5] == list("dream"):
        for _ in range(5):
            A.leftpop()
    elif A[:6] == list("eraser"):
        for _ in range(6):
            A.leftpop()
    elif A[:5] == list("erase"):
        for _ in range(5):
            A.leftpop()
    else:
        A = [0]
if A == []:
    print("YES")
else:
    print("NO")


Fixed submission:
s = input().replace("eraser", "").replace("erase", "")
s = s.replace("dreamer", "").replace("dream", "")
if s:
    print("NO")
else:
    print("YES")

Buggy python submission (verdict: Runtime Error):
from collections import deque
A = deque(input())
while A != [] and A != [0]:
    if A[:7] == list("dreamer") and A[5:10] != list("erase"):
        A = A[7:]
    elif A[:5] == list("dream"):
        A = A[5:]
    elif A[:6] == list("eraser"):
        A = A[6:]
    elif A[:5] == list("erase"):
        A = A[5:]
    else:
        A = [0]
if A == []:
    print("YES")
else:
    print("NO")


Fixed submission:
s = input().replace("eraser", "").replace("erase", "")
s = s.replace("dreamer", "").replace("dream", "")
if s:
    print("NO")
else:
    print("YES")

Buggy python submission (verdict: Time Limit Exceeded):
A = list(input())
while A != [] and A != [0]:
    if A[:7] == list("dreamer") and A[5:10] != list("erase"):
        A = A[7:]
    elif A[:5] == list("dream"):
        A = A[5:]
    elif A[:6] == list("eraser"):
        A = A[6:]
    elif A[:5] == list("erase"):
        A = A[5:]
    else:
        A = [0]
if A == []:
    print("YES")
else:
    print("NO")


Fixed submission:
s = input().replace("eraser", "").replace("erase", "")
s = s.replace("dreamer", "").replace("dream", "")
if s:
    print("NO")
else:
    print("YES")

Buggy python submission (verdict: Time Limit Exceeded):
from collections import deque
A = deque()
A.append(list(input()))
while A[0] != [] and A[0] != [False]:
        if A[0][:7] == list("dreamer"):
            A.appendleft(A[0][7:])
            A[1] = A[1][5:]
        elif A[0][:5] == list("dream"):
            A[0] = A[0][5:]
        elif A[0][:6] == list("eraser"):
            A.appendleft(A[0][6:])
            A[1] = A[1][5:]
        elif A[0][:5] == list("erase"):
            A[0] = A[0][5:]
        else:
            A.popleft()
            if len(A) == 0:
                A.append([False])
if A[0] == []:
    print("YES")
else:
    print("NO")


Fixed submission:
s = input().replace("eraser", "").replace("erase", "")
s = s.replace("dreamer", "").replace("dream", "")
if s:
    print("NO")
else:
    print("YES")

Buggy python submission (verdict: Time Limit Exceeded):
from collections import deque
A = deque()
A.append(list(input()))
while A[0] != [] and A[0] != [False]:
        if A[0][:7] == list("dreamer"):
            A.appendleft(A[0][7:])
            A[1] = A[1][5:]
        elif A[0][:5] == list("dream"):
            A[0] = A[0][5:]
        elif A[0][:6] == list("eraser"):
            A.appendleft(A[0][6:])
            A[1] = A[1][5:]
        elif A[0][:5] == list("erase"):
            A[0] = A[0][5:]
        else:
            A.popleft()
            if A == deque():
                A.append([False])
if A[0] == []:
    print("YES")
else:
    print("NO")


Fixed submission:
s = input().replace("eraser", "").replace("erase", "")
s = s.replace("dreamer", "").replace("dream", "")
if s:
    print("NO")
else:
    print("YES")