Problem:
 Score : 100 points    Problem Statement There are S sheep and W wolves.  If the number of wolves is greater than or equal to that of sheep, the wolves will attack the sheep.  If the wolves will attack the sheep, print unsafe ; otherwise, print safe .      Constraints  1 \leq S \leq 100  1 \leq W \leq 100         Input Input is given from Standard Input in the following format:  S  W       Output If the wolves will attack the sheep, print unsafe ; otherwise, print safe .        Sample Input 1 4 5      Sample Output 1 unsafe  There are four sheep and five wolves. The number of wolves is not less than that of sheep, so they will attack them.       Sample Input 2 100 2      Sample Output 2 safe  Many a sheep drive away two wolves.       Sample Input 3 10 10      Sample Output 3 unsafe

Solution (Python):
s, w = map(int, input().split())
if s <= w:
    print('unsafe')
else:
    print('safe')

Solution (Python):







import sys
from functools import lru_cache

sys.setrecursionlimit(10**9)

Input = lambda: sys.stdin.readline().rstrip()
IntRead = lambda: int(Input())
LineRead = lambda: list(map(int, Input().split()))


INF = 10**18

def main():
    S, W = LineRead()
    print("unsafe" if W >= S else 'safe')

if __name__ == "__main__":
    main()

Solution (Python):
S, W = map(int, input().split())

if S > W:
    print("safe")
else:
    print("unsafe")

Solution (Python):
S, W = map(int, input().split())
if S <= W:
    print("unsafe")
else:
    print("safe")

Solution (Python):
s, w = [int(i) for i in input().split()]
print("unsafe" if s<=w else "safe")

Solution (Python):
def main(S=None):
    if not S:
        S, W = map(int, input().split())
    if W >= S:
        print("unsafe")
    else:
        print("safe")


if __name__ == "__main__":
    main()

Solution (Python):
S,W=map(int,input().split())
if W >= S:
    print('unsafe')
else:
    print('safe')

Solution (Python):
s,w = map(int, input().split())
if w>=s:
  print("unsafe")
else:
  print("safe")

Solution (Python):
S,W = map(int,input().split())
if S<=W:
    print('unsafe')
else:
    print('safe')

Solution (Python):
s, w = [int(x) for x in input().split()]
if w >= s:
    print("unsafe")
else:
    print("safe")

Solution (Python):
S, W = map(int, input().split())

if W >= S:
  print("unsafe")
else:
  print("safe")

Solution (Python):
s,w=map(int,input().split())
print('unsafe' if w>=s else 'safe')

Solution (Python):
s,w = map(int,input().split())
if w>=s:
      print("unsafe")
else:
      print("safe")

Solution (Python):
s,w = map(int,input().split())
if s > w:
    print('safe')
else:
    print('unsafe')

Solution (Python):
s, w = map(int, input().split())

if w >= s:
  print("unsafe")
else:
  print("safe")

Solution (Python):
s, w = map(int,input().split())

if s <= w:
  print('unsafe')
else:
  print('safe')

Solution (Python):


def solve():

    S, W = map(int, input().split())

    if W >= S:
        print("unsafe")
    else:
        print("safe")


if __name__ == "__main__":
    solve()

Solution (Python):
S,W=list(map(int, input().split()))
if W>=S:
  print('unsafe')
else:
  print('safe')

Solution (Python):
date=input().rstrip().split(" ")
S=int(date[0])
W=int(date[1])
if S<=W:
  print("unsafe")
else:
  print("safe")

Solution (Python):
s,w = map(int,input().split())
if w>=s:
    print("unsafe")
else:
    print("safe")

Solution (Python):
s,w=map(int,input().split())
print('unsafe') if w>=s else print('safe')

Solution (Python):
S,W=map(int,input().split())
if S<=W:
  print("unsafe")
else:
  print("safe")

Solution (Python):
s, w = list(map(int, input().split()))

if s <= w:
    print('unsafe')
else:
    print('safe')

Solution (Python):
a,b=map(int,input().split())
print("unsafe" if a<=b else "safe")

Solution (Python):
S,W=map(int,input().split())

if S<=W:
    print('unsafe')
else:
    print('safe')

Solution (Python):
S ,W = map(int, input().split())
if S <= W:
    print("unsafe")
else:
    print("safe")

Solution (Python):

A,B = list(map(int, input().split()))

if A<=B:
    print("unsafe")
else:
    print("safe")

Solution (Python):
s, w = map(int, input().split())
print('unsafe' if s <= w else 'safe')

Solution (Python):
s, w = map(int, input().split())
if s > w:
    print("safe")
else:
    print("unsafe")

Solution (Python):
u,w = map(int,input().split())
if u > w:
  print('safe')
else:
  print('unsafe')

Solution (Python):
S,W = map(int,input().split())

if W >= S:
    print("unsafe")
else:
    print("safe")

Solution (Python):

def main():
    s,w = map(int,input().split())
    if s <= w:
        print("unsafe")
    else:
        print("safe")

if __name__ == '__main__':
    main()

Solution (Python):
s,w=map(int,input().split())

if w>=s:
    print("unsafe")
else:
    print("safe")

Solution (Python):
s, w = map(int, input().split())
if w >= s:
  print("unsafe")
else:
  print("safe")

Solution (Python):
S,W=map(int,input().split())
if W>=S:
    print("unsafe")
else:
    print("safe")

Solution (Python):
def main():
    s, w = map(int, input().split())
    if w >= s:
        print("unsafe")
    else:
        print("safe")

if __name__ == "__main__":
    main()

Solution (Python):
s, w = map(int, input().split())
if w >= s:
    print('unsafe')
else:
    print('safe')

Solution (Python):
S, W = map(int, input().split())

print('unsafe' if S <= W else 'safe')

Solution (Python):
X, Y = map(int, input().split())
if X > Y:
    print('safe')
elif X <= Y:
    print('unsafe')

Solution (Python):
s, w = map(int, input().split())

if w>=s:
    print('unsafe')
else:
    print('safe')

Solution (Python):
s,w = map(int,input().split())
if s <= w:
    print("unsafe")
else:
    print("safe")

Solution (Python):
s,w=map(int, input().split())
if w >= s:
    print("unsafe")
else:
    print("safe")

Solution (Python):
def input_one_number():
    return int(input())

def input_multiple_number():
    return map(int, input().split())

def input_multiple_number_as_list():
    return list(map(int, input().split()))


S,W = input_multiple_number()
if W >= S:
	print("unsafe")
else:
	print("safe")

Solution (Python):
from sys import stdin

def main():

    input = stdin.readline

    S,W = map(int,input().split())

    if S > W:
        print("safe")
    else:
        print("unsafe")
    
if __name__ == "__main__":
    main()

Solution (Python):
s,w = map(int,input().split())
if s >w:
  print('safe')
else:
  print('unsafe')

Solution (Python):
s, w = map(int, input().split())
if w >= s:
  print('unsafe')
else:
  print('safe')

Solution (Python):
S, W = map(int, input().split())
if(S <= W):
  print('unsafe')
else:
  print('safe')

Solution (Python):
S, W = map(int, input().split())
if W >= S:
    print("unsafe")
else:
    print("safe")

Solution (Python):
S, W = map(int, input().split())

if W >= S:
  print("unsafe")
else:
  print("safe")

Solution (Python):
A,B=map(int,input().split())
if A>B:
    print("safe")
else:
    print("unsafe")

Solution (Python):
s , w = map(int, input().split())
if s<=w:
    print('unsafe')
else:
    print('safe')

Solution (Python):
s, w = map(int, input().split())
if s <= w:
    print("unsafe")
else:
    print("safe")

Solution (Python):
def main():
    import sys
    input = sys.stdin.readline

    S, W = map(int, input().split())
    if S > W:
        print('safe')
    else:
        print('unsafe')


if __name__ == "__main__":
    main()

Solution (Python):
s,w = map(int,input().split())
if s > w:
    print("safe")
else:
    print("unsafe")

Solution (Python):
s, w = map(int, input().split())

if s <= w:
    print("unsafe")
else:
    print("safe")

Solution (Python):
s, w = map(int, input().split())
print('unsafe' if s <= w else 'safe')

Solution (Python):
s, w = map(int, input().split())
if s > w:
    print('safe')
else:
    print('unsafe')

Solution (Python):
s, w = map(int, input().split())
if s > w :
    print('safe')
else:
    print('unsafe')

Solution (Python):
s,w=map(int,input().split())
if w>=s:
	print("unsafe")
else:
	print("safe")

Solution (Python):
s,w = map(int,input().split())

if w>=s:
    print("unsafe")
else:
    print("safe")

Solution (Python):
s,w=map(int,input().split())
print('unsafe' if s<=w else 'safe')

Solution (Python):

S,W = list(map(int,input().split()))

if W>=S:
    print("unsafe")
else:
    print("safe")

Solution (Python):
S,W = map(int,input().split())
if S <= W:
  print('unsafe')
else:
  print('safe')

Solution (Python):
s,w=map(int,input().split())
if w>=s:
  print('unsafe')
else:
  print('safe')

Solution (Python):
def LI(): return list(map(int,input().split()))
S,W = LI()
print('unsafe' if W>=S else 'safe')

Solution (Python):
S,W = map(int,input().split(" "))
if (W>=S):
    print("unsafe")
else:
    print("safe")

Solution (Python):
s, w = list(map(int, input().split()))

ans = "unsafe"
if s > w:
    ans = "safe"
print(ans)

Solution (Python):
s,w=map(int,input().split())

if s<=w:
    print("unsafe")
else:
    print("safe")

Solution (Python):
S,W= list(map(int, input().split()))
if S>W:
    print("safe")
else:
    print("unsafe")

Solution (Python):

K,S = list(map(int,input().split()))

if K > S:
  print("safe")
else:
  print("unsafe")

Solution (Python):
s, w = map(int, input().split())
print('safe' if w<s else 'unsafe')

Solution (Python):
s,w=map(int,input().split())
if(w>=s):
	print("unsafe")
else:
	print("safe")

Solution (Python):
s,w = map(int,input().split())
if w >= s:
    print("unsafe")
else:
    print("safe")

Solution (Python):
sw = input().split()
s = int(sw[0])
w = int(sw[1])

if s <= w:
	print('unsafe')
else :
	print('safe')

Solution (Python):
x,y = map(int,input().split())
if y >= x:
    print("unsafe")
else:
    print("safe")

Solution (Python):
s, w = map(int, input().split())
print('unsafe' if s <= w else 'safe')

Solution (Python):
s,w = map(int, input().split())

if w >= s:
    print('unsafe')
else:
    print('safe')

Solution (Python):


S, W = map(int, input().split(' '))

if S <= W:
    print('unsafe')
else:
    print('safe')

Solution (Python):
a=input().split(" ")
s=int(a[0])
w=int(a[1])
if w>=s:
    print("unsafe")
else:
    print("safe")

Solution (Python):

S, W = map(int,input().split())

if S <= W :
    print("unsafe")
else:
    print("safe")

Solution (Python):
s,w = map(int,input().split())
if s <= w:
    print("unsafe")
else:
    print("safe")

Solution (Python):
s,w = map(int,input().split())

if s <= w:
    print("unsafe")
else:
    print("safe")

Solution (Python):

S, W = map(int,input().split())

if W >= S:
    print("unsafe")

else:
    print("safe")

Solution (Python):
S,W = map(int,input().split())

if W >= S:
    print('unsafe')
else:
    print('safe')

Solution (Python):
N, H = map(int, input().split())

if H >= N:
    print('unsafe')
else:
    print('safe')

Solution (Python):
import numpy as np

s, w = map(int, input().split())
if s > w:
    print("safe")
else:
    print("unsafe")

Solution (Python):
n,m = map(int, raw_input().split(' '))
print 'unsafe' if n <= m else 'safe'

Solution (Python):
S, W = map(int, input().split())
print("safe" if S > W else "unsafe")

Solution (Python):
def i1str():
    return input()


def istrs(n=None):
    if n is None:
        return input().split()
    a = []
    for _ in range(n):
        a.append(istrs())
    return a


def i1num():
    return int(input())


def inums(n=None):
    if n is None:
        return list(map(int, input().split()))
    a = []
    for _ in range(n):
        a.append(inums())
    return a


def ostrs(l, sp=" "):
    print(sp.join(l))


def onums(l, sp=" "):
    print(sp.join(map(str, l)))


def solve(n):
    return n


if __name__ == "__main__":
    s, w = inums()
    print("safe" if s > w else "unsafe")

Solution (Python):
S, W = list(map(int, input().split()))
if W >= S:
    print('unsafe')
else :
    print('safe')

Solution (Python):
def main():
    s,w = (int(x) for x in input().split())
    print('unsafe' if w >= s else 'safe')

if __name__ == '__main__':
    main()

Solution (Python):
S, W = [int(i) for i in input().split()]

if (S <= W):
    print('unsafe')
else:
    print('safe')

Solution (Python):
S, W = map(int, input().split())

if S <= W:
    print("unsafe")
else:
    print("safe")

Solution (Python):

S, W = map(int, input().split())


print("unsafe" if W >= S else "safe")

Solution (Python):
s,w = map(int,input().split())
if w >= s:
    print('unsafe')
else:
    print('safe')

Solution (Python):
















S,W = map(int,input().split())

if W-S>=0:
    print("unsafe")
else:
    print("safe")

Solution (Python):
s,w = map(int,input().split())
print('unsafe' if s <= w else 'safe')

Solution (Python):
S, W = map(int, input().split())
if W >= S:
    print('unsafe')
else:
    print('safe')

Solution (Python):
s, w = map(int, input().split())


if w>=s:
  print('unsafe')
else:
  print('safe')

Solution (Python):
S,W = map(int,input().split())

if S <= W:
    print('unsafe')
else:
    print('safe')

Solution (Python):
S,W = [int(i) for i in input().split()]
print(["safe","unsafe"][W>=S])

Solution (Python):
S,W = map(int,input().split())
print("unsafe" if W >= S else "safe")

Solution (Python):
s, w = map(int, input().split())
if s <= w:
    print("unsafe")
else:
    print("safe")

Solution (Python):
from sys import stdin

def main():
	inp=stdin.readline
	s,w=map(int, inp().split())
	if w>=s:
		print("unsafe")
	else:
		print("safe")
main()

Solution (Python):
a=list(map(int, input().split()))
s=a[0]
w=a[1]
if s>w:
    print('safe')
else:
    print('unsafe')

Solution (Python):
s, w = map(int, input().split())

if s <= w:
    print('unsafe')
else:
    print('safe')

Solution (Python):
S,W =map(int,input().split())
if W >= S:
    print("unsafe")
else:
    print("safe")

Solution (Python):
S, W = map(int, input().split())

if W>=S:
    print('unsafe')
else:
    print('safe')

Solution (Python):
S,W=map(int,input().split())
if S>W:
    print('safe')
else:
    print('unsafe')

Solution (Python):
if __name__ == "__main__":
    s, w = map(int, input().split())

    if w >= s:
        print('unsafe')
    else:
        print('safe')

Solution (Python):
S,W=map(int,input().split())
if(S<=W):
  print("unsafe")
else:
  print("safe")

Solution (Python):
s,w = (int(x) for x in input().split())

if w>=s:
    print("unsafe")
else:
    print("safe")

Solution (Python):
import queue
import copy
import math
from collections import deque
import bisect


s, w = map(int, input().split())

print("unsafe") if w >= s else print("safe")

Solution (Python):
S,W = map(int,input().split())
if S> W:
    print("safe")
else:
    print("unsafe")

Solution (Python):
s, w = [int(i) for i in input().split()]
print("unsafe" if s <= w else "safe")

Solution (Python):
S, W = map(int,input().split(' '))

if S <= W :
    print("unsafe")
else:
    print("safe")

Solution (Python):
s ,w = map(int,input().split())
print('unsafe' if w >= s else 'safe')

Solution (Python):
s, w = map(int, input().split())
if w >= s:
    print('unsafe')
else:
    print('safe')

Solution (Python):
s, w = tuple(map(int, input().split()))

if s <= w:
    print('unsafe')
else:
    print('safe')

Solution (Python):
s, w = map(int, input().split())
if w >= s:
    print('unsafe')

else:
    print('safe')

Solution (Python):
s, w = map(int, input().split())

print("unsafe") if s <= w else print("safe")

Solution (Python):
s, w = map(int, input().split())

if s <= w:
    print("unsafe")
else:
    print("safe")

Solution (Python):
s,w = map(int,input().split())
if s <= w:
    print('unsafe')
else:
    print('safe')

Solution (Python):

s, w = map(int, input().split())
print(['unsafe', 'safe'][s > w])

Solution (Python):
s,w=map(int,input().split())
print('unsafe' if w>=s else 'safe')

Solution (Python):
s, w = map(int, input().split())

if w >= s:
    ans = "unsafe"
else:
    ans = "safe"

print(ans)

Solution (Python):
s,w = map(int,input().split())
if s > w:
    print("safe")
else:
    print("unsafe")

Solution (Python):
S, W = map(int,input().split())
if S> W:
  print("safe")
else:
  print("unsafe")

Solution (Python):
s,w = map(int,input().split())
print(["unsafe","safe"][w<s])

Solution (Python):
N, M = map(int, input().split())

if N <= M:
    print("unsafe")
else:
    print("safe")

Solution (Python):
s,w=input().split()
if(int(s)>int(w)):
    print('safe')
else:
    print('unsafe')

Solution (Python):
s, w = map(int, input().split())


if(s > w):
    print('safe')
else:
    print('unsafe')

Solution (Python):
s, w = list(map(int, input().split(' ')))
if s <= w:
    print("unsafe")
else:
    print("safe")

Solution (Python):
s,w=map(int,input().split())
print("unsafe"  if  s<=w else "safe")

Solution (Python):
s, w = map(int, input().split())
if s > w:
  print("safe")
else:
  print("unsafe")

Solution (Python):
s,w=map(int,raw_input().split())
if w>=s:
	print "unsafe"
else:
	print "safe"

Solution (Python):


import sys
import math
import time

import collections
from collections import deque
from collections import Counter
import queue
import copy
import bisect
import heapq
import itertools








s, w = map(int,input().split())
ans = 0
if(s-w<=0):
    print("unsafe")
else:
    print("safe")

Solution (Python):
s, w = map(int,input().split())
print("unsafe" if w >= s else "safe")

Solution (Python):
def main():
    ans = 'safe'
    s,w = map(int, input().split())
    if w >= s:
        ans = 'unsafe'
    
    print(ans)

if __name__ == '__main__':
    main()

Solution (Python):
S, W = map(int, input().split())
if S <= W:
    print("unsafe")
else:
    print("safe")

Solution (Python):
S, W = map(int, input().split())

if S <= W:
    print('unsafe')
else:
    print('safe')

Solution (Python):
def main():
    S, W = [int(x) for x in input().split()]
    if S > W:
        print("safe")
    else:
        print("unsafe")   

if __name__ == "__main__":
    main()

Solution (Python):
s, w = map(int, input().split())
if s<=w:
    print('unsafe')
else:
    print('safe')

Solution (Python):
S,W = map(int,input().split())
if S > W:
    print("safe")
else:
    print("unsafe")

Solution (Python):
S, W = map(int, input().split())
if S <= W:
  print("unsafe")
else:
  print("safe")

Solution (Python):
S, W = map(int, input().split())

if W >= S:
    print("unsafe")
else:
    print("safe")

Solution (Python):
s, w = map(int, input().split())
if s <= w:
    print("unsafe")
else:
    print("safe")

Solution (Python):
a, b = map(int, input().split())

if a > b:
    print('safe')
else:
    print('unsafe')

Solution (Python):

import sys
import numpy as np


def solve(S: int, W: int):
    if W>=S:
        print('unsafe')
    else:
        print('safe')
    return



def main():
    def iterate_tokens():
        for line in sys.stdin:
            for word in line.split():
                yield word
    tokens = iterate_tokens()
    S = int(next(tokens))  
    W = int(next(tokens))  
    solve(S, W)

if __name__ == '__main__':
    main()

Solution (Python):
s,w=map(int,input().split())
print("safe" if s>w else "unsafe")

Solution (Python):
s, w = map(int, input().split())
print("unsafe") if s <= w else print("safe")

Solution (Python):
S, W = map(int, input().split())
print('unsafe' if W>=S else 'safe')

Solution (Python):
s, w = map(int, input().split())
if s <= w:
    print("unsafe")
else:
    print("safe")

Solution (Python):
s,w=map(int,input().split())

if w>=s:
    print("unsafe")
else:
    print("safe")

Solution (Python):
s,w = map(int,input().split())
k = w-s
if(k>=0):
  print("unsafe")
else:
  print("safe")

Solution (Python):

import sys


def solve(S: int, W: int):
    if S <= W:
        print("unsafe")
    else:
        print("safe")
    return



def main():
    def iterate_tokens():
        for line in sys.stdin:
            for word in line.split():
                yield word
    tokens = iterate_tokens()
    S = int(next(tokens))  
    W = int(next(tokens))  
    solve(S, W)

if __name__ == '__main__':
    main()

Solution (Python):

s, w = map(int, input().split())
print('unsafe' if s <= w else 'safe')

Solution (Python):
s, w = map(int, input().split())

if s > w:
  print("safe")
else:
  print("unsafe")

Solution (Python):
s,w = map(int, input().split())

if s > w:
    print('safe')
else:
    print('unsafe')

Solution (Python):
s,w = map(int,input().split())

if s > w:
    print('safe')
else:
    print('unsafe')

Solution (Python):
S, W = map(int, input().split())

print("safe" if S > W else "unsafe")

Solution (Python):
def abc164_a():
  s, w = map(int, input().split())
  if s <= w: print('unsafe')
  else: print('safe')

abc164_a()

Solution (Python):

def resolve():
    S, W = map(int, input().split())
    print("safe" if S > W else "unsafe")

if __name__ == "__main__":
    resolve()

Solution (Python):
s, w = map(int, input().split())

if w>=s:
	print('unsafe')
else:
	print('safe')

Solution (Python):
s,w= map(int, input().split())

if s<=w:
    print('unsafe')
else:
    print('safe')

Solution (Python):
def resolve():
    s, w = map(int, input().split())
    print("unsafe" if w >= s else "safe")


if __name__ == '__main__':
    resolve()

Solution (Python):
S,W = [int(x) for x in input().split()]
if S>W:
  print("safe")
else:
  print("unsafe")

Solution (Python):


import sys

DEBUG = False

def read(t):
    return t(sys.stdin.readline().rstrip())


def read_list(t, sep = " "):
    return [t(s) for s in sys.stdin.readline().rstrip().split(sep)]


def dprint(*args, **kwargs):
    if DEBUG:
        print(*args, **kwargs)
    return


def main():
    s, w = read_list(int)
    if s <= w:
        print("unsafe")
    else:
        print("safe")


if __name__ == "__main__":
    main()

Solution (Python):
A=list(map(int,input().split()))
if A[1]>=A[0]:
  print("unsafe")
else:
  print("safe")

Solution (Python):
import itertools
import math
import string
import collections
from collections import Counter
from collections import deque
import sys
sys.setrecursionlimit(2*10**5)
INF = 2**60


def readints():
    return list(map(int, input().split()))


def nCr(n, r):
    return math.factorial(n)//(math.factorial(n-r)*math.factorial(r))


def has_duplicates2(seq):
    seen = []
    for item in seq:
        if not(item in seen):
            seen.append(item)
    return len(seq) != len(seen)


def divisor(n):
    divisor = []
    for i in range(1, n+1):
        if n % i == 0:
            divisor.append(i)
    return divisor



dx = [-1, -1, -1, 0, 0, 1, 1, 1]
dy = [-1, 0, 1, -1, 1, -1, 0, 1]
S, W = readints()
if S <= W:
    print('unsafe')
else:
    print('safe')

Solution (Python):
s,w=map(int,input().split())
if s<=w:
  print("unsafe")
else:
  print("safe")

Solution (Python):
s,w=map(int,input().split())
if s>w:
    print("safe")
else:
    print("unsafe")

Solution (Python):
S, W = map(int,input().split())
if W >= S:
    print("unsafe")
else:
    print("safe")

Solution (Python):
s, w = map(int, input().split())
if w >= s:
    print('unsafe')
else:
    print('safe')

Solution (Python):


if __name__ == '__main__':
    s, w = map(int, input().split())

    

    

    if (w >= s):
        print("unsafe")
    else:
        print("safe")

Solution (Python):
import sys
read = sys.stdin.read
readline = sys.stdin.readline
readlines = sys.stdin.readlines

def main():
    s,w = map(int, readline().split())

    print("unsafe" if w >= s else "safe")


if __name__ == "__main__":
    main()

Solution (Python):
s, w = map(int, input().split())
if w >= s:
  print('unsafe')
else:
  print('safe')

Solution (Python):
s,w=map(int,input().split())
if s > w:
    print("safe")
else:
    print("unsafe")

Solution (Python):
S, W = map(int, input().split())

if S > W:
    print("safe")
else:
    print("unsafe")

Solution (Python):
s, w = map(int, input().split())
if s > w:
    print("safe")
else:
    print("unsafe")

Solution (Python):
def main():
    s, w = map(int, input().split())
    if w >= s:
        print("unsafe")
    else:
        print("safe")


if __name__ == '__main__':
    main()

Solution (Python):

import sys


def solve(S: int, W: int):
    if W >= S:
        print("unsafe")
    else:
        print("safe")
    return



def main():
    def iterate_tokens():
        for line in sys.stdin:
            for word in line.split():
                yield word
    tokens = iterate_tokens()
    S = int(next(tokens))  
    W = int(next(tokens))  
    solve(S, W)

if __name__ == '__main__':
    main()

Solution (Python):
S,W=map(int,input().split())
if W>=S:
    print("unsafe")
else:
    print("safe")

Solution (Python):
S, W = map(int, input().split())
ans = "safe"
if W >= S:
    ans = "unsafe"

print(ans)

Solution (Python):
s, w = map(int, input().split())

if s > w:
  print("safe")
else:
  print("unsafe")

Solution (Python):
s,w=map(int, input().split())

if w >= s:
    print('unsafe')
else:
    print('safe')

Solution (Python):
S,W = map(int,input().split())
if W >= S:
  print('unsafe')
else:
  print('safe')

Solution (Python):
s, w = map(int, input().split())

if s >w:
    print("safe")
else:
    print("unsafe")

Solution (Python):
S, W = map(int, input().split())
if W >= S:
    print('unsafe')
else:
    print('safe')

Solution (Python):
S,W = map(int,input().split())
if S <= W:
  print("unsafe")
else:
  print("safe")

Solution (Python):
s,w = map(int,input().split())
if s > w:
    print("safe")
else:
    print("unsafe")

Solution (Python):
S, W = map(int, input().split())
if W >= S:
    print('unsafe')
else:
    print('safe')

Solution (Python):
s, w = map(int, input().split(" "))
print("unsafe") if w >= s else print("safe")

Solution (Python):
S, W = list(map(int, input().split()))

print('unsafe' if S <= W else 'safe')

Solution (Python):
a,b=map(int,input().split())

if b>=a:
  print("unsafe")

else:
  print("safe")

Solution (Python):
x = input()
xs = x.split(" ")
S = xs[0]
W = xs[1]
if int(S) > int(W):
  print("safe")
else:
  print("unsafe")

Solution (Python):


S, W = map(int, input().split())
if W >= S:
    print("unsafe")
else:
    print("safe")

Solution (Python):
s,w=map(int,input().split())
if w>=s:
    print('unsafe')
else:
    print('safe')

Solution (Python):
S,W = list(map(int, input().split()))

if W >= S:
    print('unsafe')
else:
    print('safe')

Solution (Python):
S, W = map(int, input().split())
if S <= W:
    print('unsafe')
else:
    print('safe')

Solution (Python):
import sys
import decimal
input=sys.stdin.readline

S,W=[int(x) for x in input().split()]
if W>=S:
    print("unsafe")
else:
    print("safe")

Solution (Python):
s,w= map(int, input().split()) 
if w>=s:
    print('unsafe')
else:
    print('safe')

Solution (Python):
S,W=map(int,input().split())
if S<=W:
    print("unsafe")
else:
    print("safe")

Solution (Python):
N,W = map(int,input().split())



if N<=W:
    print('unsafe')

else:
    print('safe')

Solution (Python):

import sys
s, w = map(int, sys.stdin.readline().strip().split())
if w >= s:
    print('unsafe')
else:
    print('safe')

Solution (Python):


s, w = map(int, input().split())
if w>=s:
    print('unsafe')
else:
    print('safe')

Solution (Python):
def main():
    s,w = map(int,input().split())
    if s > w:
        print('safe')
    else:
        print('unsafe')


main()

Solution (Python):
s,w = map(int, input().split())
if s <= w:
    print("unsafe")
else:
    print("safe")

Solution (Python):
s, w = map(int, input().split())
if s <= w:
    print('unsafe')
else:
    print('safe')

Solution (Python):
s, w = map(int, input().split())
print('unsafe' if w >= s else 'safe')

Solution (Python):
SW = input().split()
S,W = int(SW[0]), int(SW[1])
if(W >= S):
    print("unsafe")
else:
    print("safe")

Solution (Python):
s, w = map(int, input().split())
if s <= w:
    print("unsafe")
else:
    print("safe")

Solution (Python):
import sys
input = sys.stdin.readline

s, w = map(int, input().split())

if s<= w:
    print("unsafe")
else:
    print("safe")

Solution (Python):
s,w=map(int,input().split())
if s<=w:
    print("unsafe")
else:
    print("safe")

Solution (Python):
S,W= map(int,input().split())
if S<=W:
    print("unsafe")
else:
    print("safe")

Solution (Python):
s,w = map(int,input().split())
if s > w:
    print("safe")
else:
    print("unsafe")

Solution (Python):




def input_int():
    return int(input())



def int1(x):
    return int(x) - 1



def input_to_int_map():
    return map(int, input().split())



def input_to_int_tuple():
    return tuple(map(int, input().split()))



def input_to_int_tuple_minus1():
    return tuple(map(int1, input().split()))


def main():
    s, w = input_to_int_map()

    if s <= w:
        return "unsafe"

    return "safe"


if __name__ == "__main__":
    print(main())

Solution (Python):
s,w = map(int,input().split())
if s <= w:
    print('unsafe')
else:
    print('safe')

Solution (Python):



s, w = map(int, input().split())

if w >= s:
    print("unsafe")
else:
    print("safe")

Solution (Python):
import sys
input = sys.stdin.readline

S, W = map(int, input().split())

print('safe') if S > W else print('unsafe')

Solution (Python):
s,w=map(int,input().split())
if w>=s:
    print("unsafe")
else:
    print("safe")

Solution (Python):
S, W = map(int, input().split())
print("unsafe" if W>=S else "safe")

Solution (Python):
s, w = map(int, input().split())

if w >= s:
   print('unsafe')
else:
   print('safe')

Solution (Python):
s=input().split()
a=int(s[0])
b=int(s[1])
if a>b:
  print("safe")
else:
  print("unsafe")

Solution (Python):
def main():
    S, W = map(int, input().split())
    if W >= S:
        print("unsafe")
    else:
        print("safe")

main()

Solution (Python):
hoge = input().split()
s,w = int(hoge[0]), int(hoge[1])

if s <= w:
  print("unsafe")
else:
  print("safe")

Solution (Python):
S,W=map(int,input().split())
print('unsafe' if W>=S else 'safe')

Solution (Python):
S, W = map(int, input().split())

if W >= S:
    print('unsafe')
else:
    print('safe')

Solution (Python):
S, W = map(int, input().split())
if S>W:
  print('safe')
else:
  print('unsafe')

Solution (Python):
S, W = map(int, input().split())
print('unsafe' if W >= S else 'safe')

Solution (Python):
s, w = map(int, input().split())
if s <= w:
    print("unsafe")
else:
    print("safe")

Solution (Python):
s, w = list(map(int, input().split()))

if w >= s:
  print('unsafe')
else:
  print('safe')

Solution (Python):
a = list(map(int,input().split()))
if a[0]<=a[1]:
    print('unsafe')
else:
    print('safe')

Solution (Python):
from sys import stdin
a,b= [int(x) for x in stdin.readline().rstrip().split()]
if b >= a:
    print('unsafe')
else:
    print('safe')

Solution (Python):
a,b=map(int,input().split())

if b>=a:
  print("unsafe")
else:
  print("safe")

Solution (Python):
s, w = map(int, input().split())
if s>w:
    print('safe')
else:
    print('unsafe')

Solution (Python):


s, w = map(int, input().split())
print("unsafe" if w >= s else "safe")

Solution (Python):
S, W = map(int, input().split())
if S <= W:
    print("unsafe")
else:
    print("safe")

Solution (Python):
s, w = map(int, input().split())
if s > w:
    print("safe")
else:
    print("unsafe")

Solution (Python):
def n0():return int(input())
def n1():return [int(x) for x in input().split()]
def n2(n):return [int(input()) for _ in range(n)]
def n3(n):return [[int(x) for x in input().split()] for _ in range(n)]

s,w=n1()
print("unsafe" if s<=w else "safe")

Solution (Python):
s, w = map(int, input().split())

if w >= s:
    print('unsafe')
else:
    print('safe')

Solution (Python):
e = list(map(int,input().split(sep=" ")))
if e[0]<=e[1]:
    print("unsafe")
else:
    print("safe")

Solution (Python):
s,w=map(int,input().split())
if s<=w:
    print("unsafe")
else:
    print("safe")

Solution (Python):
sw = input('')
s = int(sw.split(' ')[0])
w = int(sw.split(' ')[1])
if s > w:
    print('safe')
else:
    print('unsafe')

Solution (Python):
s, w = map(int, input().split(" "))
if s > w:
  print("safe")
else:
  print("unsafe")

Solution (Python):
s, w = map(int, input().split())

if w>=s:
    print('unsafe')
else:
    print('safe')