Harryxun/sft_time huggingface dataset:
### BUGGY CODE ###

import sys
 
stdin = sys.stdin
inf = 1 << 60
mod = 1000000007
 
ni = lambda: int(ns())
nin = lambda x: [ni() for _ in range(x)]
na = lambda: list(map(int, stdin.readline().split()))
nan = lambda x: [na() for _ in range(x)]
ns = lambda: stdin.readline().rstrip()
nsn = lambda x: [ns() for _ in range(x)]
nas = lambda: stdin.readline().split()

a, b = na()

def is_prime(n):
    if n < 2:
        return False
    i = 2
    while i * i <= n:
        if n % i == 0:
            return False
        i += 1
    return True

def primes(n):
    p = []
    i = 1
    while i * i <= n:
        if is_prime(i) or i == 1:
            p.append(i)
        if is_prime(n // i):
            p.append(n // i)
        i += 1
    return p

def p_fact(n):
    f = []
    for i in primes(n):
        if n % i == 0:
            f.append(i)
    return f

c, d = p_fact(a), p_fact(b)
e = [i if i in d else 1 for i in c]
f = set(e)
print(len(f))

### FIXED CODE ###

import sys
 
stdin = sys.stdin
inf = 1 << 60
mod = 1000000007
 
ni = lambda: int(ns())
nin = lambda x: [ni() for _ in range(x)]
na = lambda: list(map(int, stdin.readline().split()))
nan = lambda x: [na() for _ in range(x)]
ns = lambda: stdin.readline().rstrip()
nsn = lambda x: [ns() for _ in range(x)]
nas = lambda: stdin.readline().split()

from collections import defaultdict

a, b = na()

def prime_fact(n):
    f = defaultdict(int)
    i = 2
    while i * i <= n:
        while n % i == 0:
            f[i] += 1
            n //= i
        i += 1
    if n != 1:
        f[n] += 1

    return f

c, d = prime_fact(a), prime_fact(b)
e = [i if i in d.keys() else 1 for i in c.keys()]
e.append(1)
f = set(e)
print(len(f))
### BUGGY CODE ###

import collections
n = map(int, raw_input().split(' '))
ais = map(int, raw_input().split(' '))
cc = collections.Counter(ais)
ais.sort()
forbidden = set([])
j = 0
count =0
while(j < len(ais)):
	
	if cc[ais[j]] == 1: 
		flag = True
		d= 1
		while( d * d <= ais[j]):
			if ais[j] % d == 0:
				if (d in forbidden) or ((ais[j]/d) in forbidden) :
					flag = False
					break
			d +=1
		count +=1 if flag else 0
	forbidden.add(ais[j])
	j+=1

print count

### FIXED CODE ###

import collections
n = map(int, raw_input().split(' '))
ais = map(int, raw_input().split(' '))
cc = collections.Counter(ais)
ais.sort()
m = max(ais)
p = [True for _ in range(m + 1)]

count = 0
for ai in ais:
	if p[ai] is True:
		x = 2 * ai
	 	while(x < len(p)): 
	 		p[x] = False
	 		x += ai
for ai in ais:
	if p[ai] is True:
		if cc[ai] == 1:
			count +=1
print count
### BUGGY CODE ###

n,k=map(int,input().split())
a=list(map(int,input().split()))
tu=0
td=0
for j in range(k):
  temp=[0]*n
  for i in range(n):
    td=max(i+1-a[i],1)
    tu=min(i+1+a[i],n)
    for m in range(td-1,tu):
      temp[m]=temp[m]+1
  a=temp
  if sum(a)==n**2:
    break
L=[str(t) for t in a]
L=" ".join(L)
print(L)

### FIXED CODE ###

n,k=map(int,input().split())
a=list(map(int,input().split()))
tu=0
td=0
if k>=40:
  a=[n]*n
else:
  for j in range(k):
    temp=[0]*n
    for i in range(n):
      td=max(i+1-a[i],1)
      temp[td-1]=temp[td-1]+1
      tu=min(i+1+a[i],n)
      if tu!=n:
        temp[tu]=temp[tu]-1
    a[0]=temp[0]
    for i in range(1,n):
      a[i]=a[i-1]+temp[i]
L=[str(t) for t in a]
L=" ".join(L)
print(L)
### BUGGY CODE ###

N, K, Q = [int(x) for x in input().strip().split()]
A = [int(input().strip()) for _ in range(Q)]

dp = [K] * N
for a in A:
  a -= 1
  for n in range(N):
    if n != a:
      dp[n] -=1
for s in dp:
  if s > 0:
    print('Yes')
  else:
    print('No')

### FIXED CODE ###

N, K, Q = [int(x) for x in input().strip().split()]
A = [int(input().strip()) for _ in range(Q)]

dp = {p:0 for p in range(N)}

for a in A:
  dp[a-1] += 1

for n in range(N):
  if dp[n] + K - Q > 0:
    print('Yes')
  else:
    print('No')
### BUGGY CODE ###

from collections import Counter
n = int(input())
v_tmp = input().split()
v = [int(_) for _ in v_tmp]
v_count = Counter(v_tmp)
# print(v_count)
if len(v_count) == 1:
    print(n//2)
else:
    # print("hoge")
    v_keys = list(v_count.keys())
    tmps = []
    # print(v_keys)
    for _ in v_keys:
        for _2 in v_keys:
            tmp = []
            # print(_, _2)
            if _ == _2:
                continue
            else:
                for i in range(n):
                    if i % 2 == 0:
                        tmp.append(_)
                    else:
                        tmp.append(_2)
            # print("tmp", tmp)
            if tmp == []:
                continue
            else:
                tmps.append(tmp)
    sols = []
    for _ in tmps:
        sol_tmp = 0
        for i in range(n):
            if _[i] != v_tmp[i]:
                sol_tmp += 1
        sols.append(sol_tmp)
    print(min(sols))


### FIXED CODE ###

from collections import Counter
n = int(input())
v = [int(_) for _ in input().split()]
v1 = []
v2 = []
for i in range(n):
    if i % 2 == 0:
        v1.append(v[i])
    else:
        v2.append(v[i])
v_count = Counter(v)
v1_count = Counter(v1)
v2_count = Counter(v2)
# print("v1_count", v1_count)
# print("v2_count", v2_count)
v1_comm = v1_count.most_common(1)
v2_comm = v2_count.most_common(1)
sols = []
# print("v1_comm", v1_comm)
# print("v2_comm", v2_comm)
if len(v_count) == 1:
    print(n//2)
else:
    key1 = v1_comm[0][1]
    # print("v1_comm[0][0]", v1_comm[0][0])
    # print("v2_comm[0][0]", v2_comm[0][0])
    if v1_comm[0][0] == v2_comm[0][0]:
        # print("hoge")
        v2_comm = v2_count.most_common(2)
        key2 = v2_comm[1][1]
    else:
        key2 = v2_comm[0][1]
    sols.append(n-key1-key2)
    key1 = v2_comm[0][1]
    if v1_comm[0][0] == v2_comm[0][0]:
        v1_comm = v1_count.most_common(2)
        key2 = v1_comm[1][1]
    else:
        key2 = v1_comm[0][1]
    sols.append(n-key1-key2)
    print(min(sols))
### BUGGY CODE ###

N,K = map(int,input().split())
Al = list(map(int,input().split()))
Fl = list(map(int,input().split()))

A = tuple(sorted(Al))
F = tuple(sorted(Fl,reverse = True))
Amax = A[-1]
Fmax = F[0]

x=0
if sum(A) < K:
    x = 0
else:
    xl = 0
    xh = Amax*Fmax
    while xh-xl > 0:
        xm = int((xl+xh)//2)
        if sum(max(A[i]-xm//F[i] ,0) for i in range(0,N)) > K: 
            xl = xm + 1
        else: 
            xh = xm
    else:
        x = xl
print(x)            


### FIXED CODE ###

import numpy as np

N,K = map(int,input().split())
A = np.sort(list(map(int,input().split())))
F = np.sort(list(map(int,input().split())))[::-1]

Amax = A[-1]
Fmax = F[0]

x=0
if sum(A) < K:
    x = 0
else:
    xl = 0
    xh = Amax*Fmax
    while xh-xl > 0:
        xm = int((xl+xh)//2)
        AF = A-xm//F 
        if np.sum(AF[AF>0]) > K: 
            xl = xm + 1
        else: 
            xh = xm
    else:
        x = xl
print(x)
### BUGGY CODE ###

R, G, B, N = map(int, input().split())
ans = 0
 
for Rx in range(0, N+1, R):
    for Gy in range(0, N+1, G):
        check = N - Rx - Gy
        if check % B == 0 and 0 <= check // B <= N // B:
            ans += 1
print(ans)

### FIXED CODE ###

R, G, B, N = map(int, input().split())
ans = 0
 
for Rx in range(0, N+1, R):
    for Gy in range(0, N+1, G):
        check = N - Rx - Gy
        if check % B == 0 and 0 <= check // B <= N // B:
            ans += 1
print(ans)
### BUGGY CODE ###

import math
a,b,c = map(int,input().split())
maxcnt = -99999
if c <= b-1:
	for x in range(c+1):
		cnt = (a*x)//b - a*(x//b)
		if cnt > maxcnt:
			maxcnt = cnt
else:
	x = b-1
	maxcnt = math.floor(a*x/b) - a* math.floor(x/b)
print(maxcnt)

### FIXED CODE ###

import math
a,b,c = map(int,input().split())
maxcnt = -99999
if c <= b-1:
	x = c
	cnt = (a*x)//b - a*(x//b)
	if cnt > maxcnt:
		maxcnt = cnt
else:
	x = b-1
	maxcnt = math.floor(a*x/b) - a* math.floor(x/b)
print(maxcnt)
### BUGGY CODE ###

N = int(input())

input_1 = input()
input_2 = input_1.split()

for k in range(N):
    A = map(int, input_2)

    def equal(num):
        return num / 1
    A = [equal(x) for x in A]

    ans = 0

    A.remove(A[k])

    for l in range(N - 1):
        for m in range(N - 1):
            if A[l] == A[m]:
                ans += 1
        
        ans -= 1

    ans = ans / 2

    print(int(ans))

### FIXED CODE ###

#TLE
n = int(input())
a = input().split()
ans = 0
import collections
dic = collections.Counter(a)
for i in dic.values():
    ans += i * (i-1)
ans /= 2
for i in range(n):
    print(int(ans - dic[a[i]] + 1))
### BUGGY CODE ###

N,K = map(int,input().split())
A = list(map(int,input().split()))

for k in range(1,min(K+1,50)):
    B = [0]*N
    for i in range(N):
        l = max(0,i-A[i])
        r = min(N-1,i+A[i])
        B[l] += 1
        if r+1 < N:
            B[r+1] -= 1
            
    for i in range(1,N):
        B[i] += B[i-1]
    A = B
print(*A)

### FIXED CODE ###

N,K = map(int,input().split())
A = list(map(int,input().split()))

for k in range(1,min(K+1,45)):
    B = [0]*N
    for i in range(N):
        l = max(0,i-A[i])
        r = min(N-1,i+A[i])
        B[l] += 1
        if r+1 < N:
            B[r+1] -= 1
            
    for i in range(1,N):
        B[i] += B[i-1]
    A = B
print(*A)
### BUGGY CODE ###

N,K=map(int, input().split())
R,S,P=map(int, input().split()) 
T = input()
 
ten = [0] * N
for i in range(N):
    if (T[i] == 'r'):
        ten[i] = P
    elif(T[i] == 's'):
        ten[i] = R
    else:
        ten[i] = S
 
ten2 = ten[:]
T2 = T
for i in range(N-K):
    if(T[i] == T[i+K]):
        ten[i+K] = 0
        str_list = list(T)
        str_list[i+K] = 'o'
        T = "".join(str_list)
for i in range(N-1,K-1,-1):
    if(T2[i] == T2[i-K]):
        ten2[i-K] = 0
        str_list = list(T2)
        str_list[i-K] = 'o'
        T2 = "".join(str_list)


print(max(sum(ten),sum(ten2)))

### FIXED CODE ###

N,K=map(int, input().split())
R,S,P=map(int, input().split()) 
T = list(input())

ten = [0] * N
for i in range(N):
    if (T[i] == 'r'):
        ten[i] = P
    elif(T[i] == 's'):
        ten[i] = R
    else:
        ten[i] = S
 

for i in range(N-K):
    if(T[i] == T[i+K]):
        ten[i+K] = 0
        T[i+K] = 'o'


print(sum(ten))
### BUGGY CODE ###

import sys, bisect

def main():
    N,M,*A = map(int, open(0).read().split())

    A.sort()
    for _ in range(M):
        a = int(A.pop() / 2)
        bisect.insort_left(A,a)

    print(sum(A))

if __name__=='__main__':
    main()

### FIXED CODE ###

import sys
from heapq import heappush, heappop

def main():
    _,M,*A = map(int, open(0).read().split())

    A = [-x for x in A] # reverse max to min
    A.sort()

    for _ in range(M):
        a = int(heappop(A) / 2)
        heappush(A, a)
    print(-sum(A))

if __name__=='__main__':
    main()
### BUGGY CODE ###

import bisect

n = int(input())
l = list(map(int, input().split()))
l.sort()
ans = 0

for i in range(n-2):
  for j in range(i+1, n-1):
    #print("i: "+str(i)+"  j: "+str(j))
    #print(max(l[i], l[j])-min(l[i], l[j]))
    #print(l[i]+l[j])
    #print(list(filter(lambda x: max(l[i], l[j])-min(l[i], l[j])<x<l[i]+l[j], l[j+1:])))
    temp1 = bisect.bisect_left(l[j+1:], l[j]-l[i])
    temp2 = bisect.bisect_left(l[j+1:], l[j]+l[i])
    #print(temp1)
    #print(temp2)
    ans += (temp2-temp1)
    
print(ans)

### FIXED CODE ###

from bisect import bisect_left

n = int(input())
l = list(map(int, input().split()))
l.sort()
ans = 0

for i in range(n-2):
  for j in range(i+1, n-1):
    #print("i: "+str(i)+"  j: "+str(j))
    #print(max(l[i], l[j])-min(l[i], l[j]))
    #print(l[i]+l[j])
    #print(list(filter(lambda x: max(l[i], l[j])-min(l[i], l[j])<x<l[i]+l[j], l[j+1:])))
    #temp1 = bisect_left(l[j+1:], l[j]-l[i])
    #temp2 = bisect_left(l[j+1:], l[j]+l[i])
    #print(temp1)
    #print(temp2)
    ans += bisect_left(l[j+1:], l[j]+l[i])
    
print(ans)
### BUGGY CODE ###

from functools import reduce
from operator import mul

n = int(input())
a_li = list(map(int, input().split()))

if 0 in a_li:
    print(0)
    exit()

a_li = [a for a in a_li if a != 1 and a != 0]
a_li.append(1)
ans = reduce(mul, a_li)

if ans > 1000000000000000000:
    print(-1)
    exit()
else:
    print(ans)


### FIXED CODE ###

n = int(input())
a_li = list(map(int, input().split()))

if 0 in a_li:
    print(0)
    exit()

ans = 1
a_li = [a for a in a_li if a != 1 and a != 0]
a_li.append(1)
for a in a_li:
    ans *= a
    if ans > 1000000000000000000:
        print(-1)
        exit()
print(ans)
### BUGGY CODE ###

def get_input():
    N = int(input())
    numbers = []
    for str in input().split():
        numbers.append(int(str))
    return N, numbers

def DPsolve(N, numbers):
    count = 0
    dp = [[1 for i in range(len(numbers))] for j in range(len(numbers))]
    for i in range(N):
        for j in range(N-i):
            if j == 0:
                dp[i][j] = numbers[i]
            else:
                dp[i][j] = dp[i][j-1] + numbers[i+j]
            if dp[i][j] == 0:
                count += 1
    return dp, count


if __name__ == '__main__':
    N, numbers = get_input()
    dp, count = DPsolve(N, numbers)
    print(count)

### FIXED CODE ###

def get_input():
    N = int(input())
    numbers = [int(i) for i in input().split()]
    return N, numbers

def DPsolve(N, numbers):
    count = 0
    dp = [[1 for i in range(len(numbers))] for j in range(len(numbers))]
    for i in range(N):
        for j in range(N-i):
            if j == 0:
                dp[i][j] = numbers[i]
            else:
                dp[i][j] = dp[i][j-1] + numbers[i+j]
            if dp[i][j] == 0:
                count += 1
    return dp, count

if __name__ == '__main__':
    N, numbers = get_input()
    s = [0]
    for i in range(N):
        s.append(s[-1] + numbers[i])
    s.sort()
    count = 1
    result = 0
    for i in range(N):
        if(s[i] == s[i+1]):
            count += 1
        else:
            result += count * (count -1 ) // 2
            count = 1
    result += count * (count -1 ) // 2
    print(result)
### BUGGY CODE ###

r,g,b,n=map(int,input().split())
ans=0

for i in range(1+n//r):
  red=i*r
  for j in range(1+n//g):
    green=j*g
    if((n-red-green)%b==0 and (n-red-green)>=0):
      ans+=1
print(ans)

### FIXED CODE ###

r,g,b,n=map(int,input().split())
ans=0

for i in range(1+n//r):
  red=i*r
  for j in range(1+(n-red)//g):
    green=j*g
    if((n-red-green)%b==0 and (n-red-green)>=0):
      ans+=1
print(ans)
### BUGGY CODE ###

import sys
from itertools import permutations


def input():
    return sys.stdin.readline().strip()


def main():
    H, W = map(int, input().split())

    S = [list(input()) for _ in range(H)]
    C = [2 * i for i in range(H - 1)] + [2 * j + 1 for j in range(W - 1)]
    check = list(permutations(C))
    answer = float("inf")
    for chk in check:
        if S[0][0] == "#":
            cnt = 1
        else:
            cnt = 0
        now = [0, 0]
        for i in range(H + W - 2):
            if chk[i] % 2 == 0:
                now[0] += 1
            else:
                now[1] += 1
            if now[0] <= H - 1 and now[1] <= W - 1:
                if S[now[0]][now[1]] == "#":
                    cnt += 1
            # print(now)
            # print(cnt)
        if cnt < answer:
            answer = cnt
    print(answer)


main()


### FIXED CODE ###

import sys


def input():
    return sys.stdin.readline().strip()


def main():
    H, W = map(int, input().split())

    S = [list(input()) for _ in range(H)]
    # print(S)
    check = [[10 ** 9 for i in range(W)] for j in range(H)]
    if S[0][0] == "#":
        check[0][0] = 1
    else:
        check[0][0] = 0
    for i in range(1, W):
        left = check[0][i - 1]
        if S[0][i] == "#":
            if S[0][i - 1] == "#":
                check[0][i] = left
            else:
                check[0][i] = left + 1
        else:
            check[0][i] = left
    for i in range(1, H):
        up = check[i - 1][0]
        if S[i][0] == "#":
            if S[i - 1][0] == "#":
                check[i][0] = up
            else:
                check[i][0] = up + 1
        else:
            check[i][0] = up
    for i in range(1, H):
        for j in range(1, W):
            # print(S[i][j])
            left = check[i][j - 1]
            up = check[i - 1][j]
            if S[i][j] == "#":
                if S[i][j - 1] == "#" and S[i - 1][j] == "#":
                    check[i][j] = min(left, up)
                elif S[i][j - 1] != "#" and S[i - 1][j] == "#":
                    check[i][j] = min(left + 1, up)
                elif S[i][j - 1] == "#" and S[i - 1][j] != "#":
                    check[i][j] = min(left, up + 1)
                else:
                    check[i][j] = min(left, up) + 1
            else:
                check[i][j] = min(left, up)
    # print(check)
    print(check[-1][-1])


main()
### BUGGY CODE ###

def main():
    N = int(input())
    X = tuple(map(int,input().split()))
    MOD = 10 ** 9 + 7
    goal = X[-1]
    ans = goal - X[0]
    ##########################
    x = 1
    ##########################
    count = 2
    for i in range(1,N-1): 
        tmp = goal - X[i]
        ###################################################
        ans = ((ans * count) + ((x * tmp))) % MOD
        x *= count % MOD
        ###################################################
        count += 1
    print(ans)
if __name__ == '__main__':
    main()


### FIXED CODE ###

def main():
    N = int(input())
    X = list(map(int,input().split()))
    MOD = 10 ** 9 + 7
    goal = X[-1]
    ans = goal - X[0]
    fact = [1]
    fact_inv = [1]
    for i in range(10**5+5):
        new_fact = fact[-1]*(i+1)%MOD
        fact.append(new_fact)
    count = 1
    for i in range(1,N-1):
        count += 1
        tmp = goal - X[i]
        ans = ((ans * count) + ((fact[i] * tmp))) % MOD  
    print(ans)
if __name__ == '__main__':
    main()
### BUGGY CODE ###

from collections import deque

def solve():
  h,w=map(int,input().split())
  cy,cx=map(int,input().split())
  dy,dx=map(int,input().split())

  M=["##"+input()+"##" for x in range(h)]
  for i in range(2):
    M.insert(0,"#"*(w+4))
    M.append("#"*(w+4))

  INF=10**6
  C=[[INF for _ in range(w+4)] for _ in range(h+4)]
  C[-~cy][-~cx]=0
  QA,QB=deque(),deque()
  QA.append((-~cy,-~cx,0))
  W=[[i,j] for i in range(-2,3) for j in range(-2,3) if abs(i)+abs(j)>1]

  while QA:
    h,w,c=QA.popleft()
    QB.append((h,w,c))

    for i,j in [[1,0],[0,1],[-1,0],[0,-1]]:
      dh,dw=h+i,w+j
      if M[dh][dw]=="." and c<C[dh][dw]:
        C[dh][dw]=c
        QA.appendleft((dh,dw,c))

    if QA:
      continue

    while QB:
      h,w,c=QB.popleft()
      for i,j in W:
        dh,dw=h+i,w+j
        if M[dh][dw]=="." and -~c<C[dh][dw]:
          C[dh][dw]=-~c
          QA.append((dh,dw,-~c))

  print(C[-~dy][-~dx] if C[-~dy][-~dx]!=INF else -1)

if __name__ == "__main__":
  solve()


### FIXED CODE ###

from collections import deque

def main():
  h,w=map(int,input().split())
  cy,cx=map(int,input().split())
  dy,dx=map(int,input().split())

  M=["##"+input()+"##" for x in range(h)]
  for i in range(2):
    M.insert(0,"#"*(w+4))
    M.append("#"*(w+4))

  C=[[-1 if M[j][i]=="." else -2 for i in range(w+4)] for j in range(h+4)]
  C[-~cy][-~cx]=0
  QA,QB=deque(),deque()
  QA.append((-~cy,-~cx,0))
  W=[[i,j] for i in range(-2,3) for j in range(-2,3) if abs(i)+abs(j)>1]

  while QA:
    h,w,c=QA.popleft()
    QB.append((h,w,c))

    for i,j in [[1,0],[0,1],[-1,0],[0,-1]]:
      dh,dw=h+i,w+j
      if C[dh][dw]==-1:
        C[dh][dw]=c
        QA.appendleft((dh,dw,c))

    if QA:
      continue

    while QB:
      h,w,c=QB.popleft()
      for i,j in W:
        dh,dw=h+i,w+j
        if C[dh][dw]==-1:
          C[dh][dw]=-~c
          QA.append((dh,dw,-~c))

  print(C[-~dy][-~dx])

if __name__ == "__main__":
  main()
### BUGGY CODE ###

n,k=map(int,input().split())
mod=998244353
S=set()
for _ in range(k):
  l,r=map(int,input().split())
  S|={i for i in range(l,r+1)}
dp=[0 for _ in range(n+1)]
for i in S:
  dp[i]=1

for i in range(1,n+1):
  for j in S:
    if i-j<1:
      continue
    dp[i]+=dp[i-j]
print(dp[n-1]%mod)

### FIXED CODE ###

n,k=map(int,input().split())
mod=998244353
R=[]
for _ in range(k):
  l,r=map(int,input().split())
  R.append([l,r])

dp=[0 for _ in range(n+1)]
dp[1]=1
dpsum=[0 for _ in range(n+1)]
dpsum[1]=1
for i in range(2,n+1):
  for j in range(k):
    li=i-R[j][1]
    ri=i-R[j][0]
    if ri<0:
      continue
    li=max(li,1)
    dp[i]+=(dpsum[ri]-dpsum[li-1])%mod
  dpsum[i]=dpsum[i-1]+dp[i]
  dpsum[i]%=mod
print(dp[n]%mod)
### BUGGY CODE ###

N = int(input())
min_num = 10**5
for i in range(1, (N+2//2)):
    if N % i == 0:
        min_num = min(max(len(str(i)), len(str(N//i))), min_num)
print(min_num)

### FIXED CODE ###

N = int(input())
min_num = 10**5
for i in range(1, 10**5+1):
    if N % i == 0:
        min_num = min(max(len(str(i)), len(str(N//i))), min_num)
print(min_num)
### BUGGY CODE ###

s = input()
k = int(input())

k_list = [] 
for i in range(1, len(s)+1):
    for j in range(len(s)+1-i):
        sub = s[j:j+i]
        if sub not in k_list:
            k_list.append(sub)
k_list.sort()
print(k_list[k-1])

### FIXED CODE ###

s = input()
k = int(input())

kn = len(s) * k
k_list = set(s)

for i in range(2, k+1):
    for j in range(len(s)):
        k_list.add(s[j:j+i])

k_list = list(k_list)
k_list.sort()
print(k_list[k-1])
### BUGGY CODE ###

n,W = map(int,input().split())
w = []
v = []
for _ in range(n):
    weight,value = map(int,input().split())
    w.append(weight)
    v.append(value)

INF = float("inf")
order = 10**5  + 1 
dp = [[INF] * order for _ in range(n+1)] #dp[i+1][value] i番目まで選んで価値をvalue以上にする時の重さの最小値
dp[0][0] = 0

for i in  range(n):
    for value in range(order):
        if value-v[i]>= 0:
            dp[i+1][value] = min(dp[i+1][value],dp[i][value-v[i]] + w[i])
        dp[i+1][value] = min(dp[i+1][value],dp[i][value])

ans = 0
for value in range(order):
    if dp[n][value] <= W:
        ans = max(ans,value)
print(ans)

### FIXED CODE ###

n,W = map(int,input().split())
w = []
v = []
for _ in range(n):
    weight,value = map(int,input().split())
    w.append(weight)
    v.append(value)

INF = float("inf")
order = 10**5  + 1 
dp = [[INF] * order for _ in range(n+1)] #dp[i+1][value] i番目まで選んで価値をvalue以上にする時の重さの最小値
dp[0][0] = 0

for i in  range(n):
    for value in range(order):
        if value-v[i]>= 0:
            dp[i+1][value] = min(dp[i+1][value],dp[i][value-v[i]] + w[i])
        dp[i+1][value] = min(dp[i+1][value],dp[i][value])

ans = 0
for value in range(order):
    if dp[n][value] <= W:
        ans = max(ans,value)
print(ans)
### BUGGY CODE ###

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 CODE ###

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')