Buggy python submission (verdict: Runtime Error):
from collections import deque
import sys

def fnw(n,s):
    sm=deque([])
    if n<=len(s):
        for _ in range(n):
            sm.append(s.popleft())
    return ''.join(sm)

def jfws(s):
    print(s)
    fws=fnw(5,s)
    # print(fws)
    if fws=='dream':
        fws=fnw(2,s)
        if fws=='er':
            if s:
                if s[0]=='a':
                    s.extendleft(deque(reversed(list(fws))))
        else:
            s.extendleft(deque(reversed(list(fws))))
        return False
    elif fws=='erase':
        fws=fnw(1,s)
        if fws!='r' or '':
            s.appendleft(fws)
        return False
    else:
        return True 

def main(s):
    while s:
        if jfws(s):
            return 'NO'
        print(s)
    return 'YES'

s=deque(sys.stdin.readline().strip())
print(main(s))



Fixed submission:
from collections import deque
import sys

def fnw(n,s):
    sm=deque([])
    if n<=len(s):
        for _ in range(n):
            sm.append(s.popleft())
    return sm

def jfws(s):
    # print(s)
    sm=fnw(5,s)
    # print(sm)
    if ''.join(sm)=='dream':
        sm=fnw(2,s)
        if ''.join(sm)=='er':
            if bool(s):
                if s[0]=='a':
                    s.extendleft(deque(reversed(list(sm))))
        else:
            s.extendleft(deque(reversed(list(sm))))
        return False
    elif ''.join(sm)=='erase':
        sm=fnw(1,s)
        if ''.join(sm)!='r':
            s.extendleft(sm)
        return False
    else:
        return True 

def main(s):
    while len(s)>0:
        if jfws(s):
            return 'NO'
    return 'YES'

s=deque(sys.stdin.readline().strip())
print(main(s))

Buggy python submission (verdict: Runtime Error):
from collections import deque
import sys

def fnw(n,s):
    sm=deque([])
    if n<=len(s):
        for _ in range(n):
            sm.append(s.popleft())
    return ''.join(sm)

def jfws(s):
    # print(s)
    fws=fnw(5,s)
    # print(fws)
    if fws=='dream':
        fws=fnw(2,s)
        if fws=='er':
            if s[0]=='a':
                s.extendleft(deque(reversed(list(fws))))
        else:
            s.extendleft(deque(reversed(list(fws))))
        return False
    elif fws=='erase':
        fws=fnw(1,s)
        if fws!='r':
            s.appendleft(fws)
        return False
    else:
        return True 

def main(s):
    while bool(s):
        if jfws(s):
            return 'NO'
    return 'YES'

s=deque(sys.stdin.readline().strip())
print(main(s))



Fixed submission:
from collections import deque
import sys

def fnw(n,s):
    sm=deque([])
    if n<=len(s):
        for _ in range(n):
            sm.append(s.popleft())
    return sm

def jfws(s):
    # print(s)
    sm=fnw(5,s)
    # print(sm)
    if ''.join(sm)=='dream':
        sm=fnw(2,s)
        if ''.join(sm)=='er':
            if bool(s):
                if s[0]=='a':
                    s.extendleft(deque(reversed(list(sm))))
        else:
            s.extendleft(deque(reversed(list(sm))))
        return False
    elif ''.join(sm)=='erase':
        sm=fnw(1,s)
        if ''.join(sm)!='r':
            s.extendleft(sm)
        return False
    else:
        return True 

def main(s):
    while len(s)>0:
        if jfws(s):
            return 'NO'
    return 'YES'

s=deque(sys.stdin.readline().strip())
print(main(s))

Buggy python submission (verdict: Runtime Error):
from collections import deque
import sys

def fnw(n,s):
    sm=deque([])
    if n<=len(s):
        for _ in range(n):
            sm.append(s.popleft())
    return ''.join(sm)

def jfws(s):
    print(s)
    fws=fnw(5,s)
    # print(fws)
    if fws=='dream':
        fws=fnw(2,s)
        if fws=='er':
            if s[0]=='a':
                s.extendleft(deque(reversed(list(fws))))
        else:
            s.extendleft(deque(reversed(list(fws))))
        return False
    elif fws=='erase':
        fws=fnw(1,s)
        if fws!='r':
            s.appendleft(fws)
        return False
    else:
        return True 

def main(s):
    while bool(s):
        if jfws(s):
            return 'NO'
    return 'YES'

s=deque(sys.stdin.readline().strip())
print(main(s))



Fixed submission:
from collections import deque
import sys

def fnw(n,s):
    sm=deque([])
    if n<=len(s):
        for _ in range(n):
            sm.append(s.popleft())
    return sm

def jfws(s):
    # print(s)
    sm=fnw(5,s)
    # print(sm)
    if ''.join(sm)=='dream':
        sm=fnw(2,s)
        if ''.join(sm)=='er':
            if bool(s):
                if s[0]=='a':
                    s.extendleft(deque(reversed(list(sm))))
        else:
            s.extendleft(deque(reversed(list(sm))))
        return False
    elif ''.join(sm)=='erase':
        sm=fnw(1,s)
        if ''.join(sm)!='r':
            s.extendleft(sm)
        return False
    else:
        return True 

def main(s):
    while len(s)>0:
        if jfws(s):
            return 'NO'
    return 'YES'

s=deque(sys.stdin.readline().strip())
print(main(s))

Buggy python submission (verdict: Runtime Error):
from collections import deque
import sys

def fnw(n,s):
    sm=deque([])
    if n<=len(s):
        for _ in range(n):
            sm.append(s.popleft())
    return ''.join(sm)

def jfws(s):
    fws=fnw(5,s)
    # print(fws)
    if fws=='dream':
        fws=fnw(2,s)
        if fws=='er':
            if s[0]=='a':
                s.extendleft(deque(reversed(list(fws))))
        else:
            s.extendleft(deque(reversed(list(fws))))
        return False
    elif fws=='erase':
        fws=fnw(1,s)
        if fws!='r':
            s.appendleft(fws)
        return False
    else:
        return True 

def main(s):
    while s:
        if jfws(s):
            return 'NO'
    return 'YES'

s=deque(sys.stdin.readline().strip(),10**5)
print(main(s))



Fixed submission:
from collections import deque
import sys

def fnw(n,s):
    sm=deque([])
    if n<=len(s):
        for _ in range(n):
            sm.append(s.popleft())
    return sm

def jfws(s):
    # print(s)
    sm=fnw(5,s)
    # print(sm)
    if ''.join(sm)=='dream':
        sm=fnw(2,s)
        if ''.join(sm)=='er':
            if bool(s):
                if s[0]=='a':
                    s.extendleft(deque(reversed(list(sm))))
        else:
            s.extendleft(deque(reversed(list(sm))))
        return False
    elif ''.join(sm)=='erase':
        sm=fnw(1,s)
        if ''.join(sm)!='r':
            s.extendleft(sm)
        return False
    else:
        return True 

def main(s):
    while len(s)>0:
        if jfws(s):
            return 'NO'
    return 'YES'

s=deque(sys.stdin.readline().strip())
print(main(s))

Buggy python submission (verdict: Runtime Error):
from collections import deque
import sys

def fnw(n,s):
    sm=deque([])
    if n<=len(s):
        for _ in range(n):
            sm.append(s.popleft())
    return ''.join(sm)

def jfws(s):
    fws=fnw(5,s)
    # print(fws)
    if fws=='dream':
        fws=fnw(2,s)
        if fws=='er':
            if s[0]=='a':
                s.extendleft(deque(reversed(list(fws))))
        else:
            s.extendleft(deque(reversed(list(fws))))
        return False
    elif fws=='erase':
        fws=fnw(1,s)
        if fws!='r':
            s.appendleft(fws)
        return False
    else:
        return True 

def main(s):
    while s:
        if jfws(s):
            return 'NO'
    return 'YES'

s=deque(sys.stdin.readline().strip())
print(main(s))



Fixed submission:
from collections import deque
import sys

def fnw(n,s):
    sm=deque([])
    if n<=len(s):
        for _ in range(n):
            sm.append(s.popleft())
    return sm

def jfws(s):
    # print(s)
    sm=fnw(5,s)
    # print(sm)
    if ''.join(sm)=='dream':
        sm=fnw(2,s)
        if ''.join(sm)=='er':
            if bool(s):
                if s[0]=='a':
                    s.extendleft(deque(reversed(list(sm))))
        else:
            s.extendleft(deque(reversed(list(sm))))
        return False
    elif ''.join(sm)=='erase':
        sm=fnw(1,s)
        if ''.join(sm)!='r':
            s.extendleft(sm)
        return False
    else:
        return True 

def main(s):
    while len(s)>0:
        if jfws(s):
            return 'NO'
    return 'YES'

s=deque(sys.stdin.readline().strip())
print(main(s))

Buggy python submission (verdict: Runtime Error):
from collections import deque
import sys

def fnw(n,s):
    sm=deque([])
    if n<=len(s):
        for _ in range(n):
            sm.append(s.popleft())
    return ''.join(sm)

def jfws(s):
    fws=fnw(5,s)
    print(fws)
    if fws=='dream':
        fws=fnw(2,s)
        if fws=='er':
            if s[0]=='a':
                s.extendleft(deque(reversed(list(fws))))
        else:
            s.extendleft(deque(reversed(list(fws))))
        return False
    elif fws=='erase':
        fws=fnw(1,s)
        if fws!='r':
            s.appendleft(fws)
        return False
    else:
        return True 

def main(s):
    while s:
        if jfws(s):
            return 'NO'
    return 'YES'

s=deque(sys.stdin.readline().strip())
print(main(s))



Fixed submission:
from collections import deque
import sys

def fnw(n,s):
    sm=deque([])
    if n<=len(s):
        for _ in range(n):
            sm.append(s.popleft())
    return sm

def jfws(s):
    # print(s)
    sm=fnw(5,s)
    # print(sm)
    if ''.join(sm)=='dream':
        sm=fnw(2,s)
        if ''.join(sm)=='er':
            if bool(s):
                if s[0]=='a':
                    s.extendleft(deque(reversed(list(sm))))
        else:
            s.extendleft(deque(reversed(list(sm))))
        return False
    elif ''.join(sm)=='erase':
        sm=fnw(1,s)
        if ''.join(sm)!='r':
            s.extendleft(sm)
        return False
    else:
        return True 

def main(s):
    while len(s)>0:
        if jfws(s):
            return 'NO'
    return 'YES'

s=deque(sys.stdin.readline().strip())
print(main(s))

Buggy python submission (verdict: Runtime Error):
from collections import deque
import sys

def fnw(n,s):
    sm=deque([])
    if n<=len(s):
        for _ in range(n):
            sm.append(s.popleft())
    return ''.join(sm)

def jfws(s):
    fws=fnw(5,s)
    if fws=='dream':
        fws=fnw(2,s)
        if fws=='er':
            if s[0]=='a':
                s.extendleft(deque(reversed(list(fws))))
        else:
            s.extendleft(deque(reversed(list(fws))))
        return False
    elif fws=='erase':
        fws=fnw(1,s)
        if fws!='r':
            s.appendleft(fws)
        return False
    else:
        return True 

def main(s):
    while True:
        if not list(s):
            return 'Yes"
        if jfws(s):
            return 'NO'
    return 'Yes'

s=deque(sys.stdin.readline().strip())
print(main(s))



Fixed submission:
from collections import deque
import sys

def fnw(n,s):
    sm=deque([])
    if n<=len(s):
        for _ in range(n):
            sm.append(s.popleft())
    return sm

def jfws(s):
    # print(s)
    sm=fnw(5,s)
    # print(sm)
    if ''.join(sm)=='dream':
        sm=fnw(2,s)
        if ''.join(sm)=='er':
            if bool(s):
                if s[0]=='a':
                    s.extendleft(deque(reversed(list(sm))))
        else:
            s.extendleft(deque(reversed(list(sm))))
        return False
    elif ''.join(sm)=='erase':
        sm=fnw(1,s)
        if ''.join(sm)!='r':
            s.extendleft(sm)
        return False
    else:
        return True 

def main(s):
    while len(s)>0:
        if jfws(s):
            return 'NO'
    return 'YES'

s=deque(sys.stdin.readline().strip())
print(main(s))

Buggy python submission (verdict: Runtime Error):
from collections import deque
import sys

def fnw(n,s):
    sm=deque([])
    if n<=len(s):
        for _ in range(n):
            sm.append(s.popleft())
    return ''.join(sm)

def jfws(s):
    fws=fnw(5,s)
    if fws=='dream':
        fws=fnw(2,s)
        if fws=='er':
            if s[0]=='a':
                s.extendleft(deque(reversed(list(fws))))
        else:
            s.extendleft(deque(reversed(list(fws))))
        return False
    elif fws=='erase':
        fws=fnw(1,s)
        if fws!='r':
            s.appendleft(fws)
        return False
    else:
        return True 

def main(s):
    while True:
        if jfws(s):
            return 'NO'
        if not bool(s):
            return 'Yes'

s=deque(sys.stdin.readline().strip())
print(main(s))



Fixed submission:
from collections import deque
import sys

def fnw(n,s):
    sm=deque([])
    if n<=len(s):
        for _ in range(n):
            sm.append(s.popleft())
    return sm

def jfws(s):
    # print(s)
    sm=fnw(5,s)
    # print(sm)
    if ''.join(sm)=='dream':
        sm=fnw(2,s)
        if ''.join(sm)=='er':
            if bool(s):
                if s[0]=='a':
                    s.extendleft(deque(reversed(list(sm))))
        else:
            s.extendleft(deque(reversed(list(sm))))
        return False
    elif ''.join(sm)=='erase':
        sm=fnw(1,s)
        if ''.join(sm)!='r':
            s.extendleft(sm)
        return False
    else:
        return True 

def main(s):
    while len(s)>0:
        if jfws(s):
            return 'NO'
    return 'YES'

s=deque(sys.stdin.readline().strip())
print(main(s))

Buggy python submission (verdict: Runtime Error):
import sys

def eat(i,candies,counter):
    s=candies[i]+candies[i-1]
    nc=max(0,s-x)
    counter+=nc
    candies[i]-=nc
    return counter

def main(n,x,candies):
    counter=0
    if candies[0]>x:
        counter=candies[0]-x
        candies[0]=x
    for i in range(1,n):
        counter=eat(i,candies,counter)
    return counter

n,x=map(int,sys.stdin.readline().strip().split())
candies=list(map(int,sys.stdin.readline().strip().split()))
print(main(n,x,candies))


Fixed submission:
from collections import deque
import sys

def fnw(n,s):
    sm=deque([])
    if n<=len(s):
        for _ in range(n):
            sm.append(s.popleft())
    return sm

def jfws(s):
    # print(s)
    sm=fnw(5,s)
    # print(sm)
    if ''.join(sm)=='dream':
        sm=fnw(2,s)
        if ''.join(sm)=='er':
            if bool(s):
                if s[0]=='a':
                    s.extendleft(deque(reversed(list(sm))))
        else:
            s.extendleft(deque(reversed(list(sm))))
        return False
    elif ''.join(sm)=='erase':
        sm=fnw(1,s)
        if ''.join(sm)!='r':
            s.extendleft(sm)
        return False
    else:
        return True 

def main(s):
    while len(s)>0:
        if jfws(s):
            return 'NO'
    return 'YES'

s=deque(sys.stdin.readline().strip())
print(main(s))