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

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

if w>=a:
  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 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 N():
    return int(input())
def L():
    return list(map(int,input().split()))
def NL(n):
    return [list(map(int,input().split())) for i in range(n)]
mod = pow(10,9)+7



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

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

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

Solution (Python):
import sys

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] = input().split()
s = int(s)
w = int(w)

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 = 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):
import sys


def solve():
    readline = sys.stdin.buffer.readline
    mod = 10 ** 9 + 7
    s, w = list(map(int, readline().split()))
    print("unsafe" if s <= w else "safe")


if __name__ == '__main__':
    solve()

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 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('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('safe')
else:
  print('unsafe')

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

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

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

Solution (Python):
nums = [int(e) for e in input().split()]

Sheep = nums[0]
Wolves = nums[1]

if Sheep > Wolves:
  print("safe")
else:
  print("unsafe")

Solution (Python):
sheep, wolves = map(int, input().split())

if sheep > wolves:
    print("safe")
elif sheep <= wolves:
    print("unsafe")

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')
elif 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 = list(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())
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("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 = 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=list(map(int, input().split()))
a=''
if s<=w:
  a='un'
print(a+'safe')

Solution (Python):



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


def main():
    S, W = map(int, input().split())
    answer = solve(S, W)
    print(answer)


if __name__ == "__main__":
    main()

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

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

Solution (Python):
s,w = [int(x) for x in 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 s <= w:
        print("unsafe")
    else:
        print("safe")

if __name__ == "__main__":
    main()

Solution (Python):
import sys

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()]

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

Solution (Python):
sw = input().split()
s = int(sw[0])
w = 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):
S, W = map(int, input().split())
ans = "safe" if S > W else "unsafe"
print(ans)

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):

R = input()
S = R.split(' ')[0]
W = R.split(' ')[1]

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

Solution (Python):
def main():
    sw = [int(_x) for _x in input().split()]
    s = sw[0]
    w = sw[1]
    if w >= s:
        print("unsafe")
    else:
        print("safe")


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("safe")
else:
    print("unsafe")

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

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

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

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):
a = list(map(int, input().split(' ')))
if a[1] >= a[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 = [int(i) for i in input().split()]
ans = 'safe' if s > w else 'unsafe'
print(ans)

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())

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())

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())
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 = (int(x) for x in 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):
o   = ['unsafe','safe']
s,w = map(int,input().split())
f   = 0


if w >= s:
    f = 0
else:
    f = 1

print(o[f])

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

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

if '__main__' == __name__:
    resolve()

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 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):
getList = lambda: list(map(int, input().split()))
a, b = getList()
if a <= b:
  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):
a,b=map(int,input().split())
if b>=a:
  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):
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())
O = 'unsafe' if W >= S else 'safe'
print(O)

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

Solution (Python):
import math
from math import gcd
INF = float("inf")

import sys
input=sys.stdin.readline
sys.setrecursionlimit(500*500)
import itertools
from collections import Counter,deque

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

if __name__=="__main__":
    main()

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

Solution (Python):

import sys
sys.setrecursionlimit(10**9)


INF=10**20
def solve(S: int, W: int):
    print("unsafe" if W >= S else "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):
sheep, wolf = list(map(int, input().split()))
print('unsafe') if sheep <= wolf else print('safe')

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

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

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

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

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

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

Solution (Python):
a = list(map(int,input().split()))
if a[1] >= a[0]:
  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=list(map(int,input().split()))

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

Solution (Python):
s, w = map(int, input().split())
if w >= s:
	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(f'{"unsafe" if W>=S else "safe"}')

Solution (Python):
vals = [int(i) for i in input().split()]
s = vals[0]
w = vals[1]
res = ("safe" if(s > w) else "unsafe")
print(res)

Solution (Python):
import sys
input = sys.stdin.readline
ins = lambda: input().rstrip()
ini = lambda: int(input().rstrip())
inm = lambda: map(int, input().split())
inl = lambda: list(map(int, input().split()))
out = lambda x: print('\n'.join(map(str, x)))

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

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

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

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("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('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("safe"if s>w else"unsafe")

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('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=list(map(int,input().split()))
if S[0]<=S[1]:
  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("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())
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 solve():
    S,W = [int(i) for i in input().split()]
    if W >= S:
        print("unsafe")
    else:
        print("safe")

if __name__ == "__main__":
    solve()

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

if s <= w:
    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):
sheep, wolf = map(int, input().split())

if wolf >= sheep:
    print("unsafe")
else:
    print("safe")

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())

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

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

Solution (Python):
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())
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):

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

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

def main(s,w):
    if w>=s:
        return 'unsafe'
    else:
        return 'safe'

if __name__=='__main__':
    s,w=readinput()
    ans=main(s,w)
    print(ans)

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')
elif W < S:
    print('safe')

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

if sw[0] <= sw[1]:
    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('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('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' if S > W else '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('safe')
else:
    print("unsafe")

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

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

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

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

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

Solution (Python):
print(["safe", "unsafe"][eval(input().replace(" ", "<="))])

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

Solution (Python):
score = list(map(int,input().split()))
if score[0] <= score[1]:
    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(" "))

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

Solution (Python):
M,N = map(int,input().rstrip().split(" "))
if N>=M:
    print("unsafe")
else:
    print("safe")

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


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

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

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

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

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

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

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

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

if 0 <= int(S) <= 100 and 0 <= int(W) <= 100:
    if int(S) <= int(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())
print("unsafe" if s<=w else "safe")

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

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

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:
  my_result = 'unsafe'
else:
  my_result = 'safe'
print(my_result)

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 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):
tmp = input().split(" ")
S = int(tmp[0])
W = int(tmp[1])

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

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

if b-a>=0:
    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")
if w<s:
    print("safe")

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

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

Solution (Python):
import sys, bisect, math, itertools, string, queue, copy
import numpy as np
import scipy
from collections import Counter,defaultdict,deque
from itertools import permutations, combinations
from heapq import heappop, heappush
from fractions import gcd
input = sys.stdin.readline
sys.setrecursionlimit(10**8)
mod = 10**9+7
def inp(): return int(input())
def inpm(): return map(int,input().split())
def inpl(): return list(map(int, input().split()))
def inpls(): return list(input().split())
def inplm(n): return list(int(input()) for _ in range(n))
def inplL(n): return [list(input()) for _ in range(n)]
def inplT(n): return [tuple(input()) for _ in range(n)]
def inpll(n): return [list(map(int, input().split())) for _ in range(n)]
def inplls(n): return sorted([list(map(int, input().split())) for _ in range(n)])

s,w = inpm()
ans = 'safe'
if s <= w:
    ans = 'unsafe'
print(ans)

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

Solution (Python):
import sys


def resolve(in_):
    s, w = map(int, next(in_).split())
    return 'safe' if s > w else 'unsafe'


def main():
    answer = resolve(sys.stdin.buffer)
    print(answer)


if __name__ == '__main__':
    main()

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

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

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