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):
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):
sheep,wolf = input().strip().split()
sheep,wolf = [int(sheep),int(wolf)]
if sheep <= wolf:
    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("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("safe")
else:
  print("unsafe")

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

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

Solution (Python):
import sys
input = sys.stdin.readline
sys.setrecursionlimit(2 * 10**6)


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


def main():
    S, W = inpl()
    if W >= S:
        print("unsafe")
    else:
        print("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):


n, k = map(int, input().split())
if (n <= k):
    print("unsafe")
else:
    print("safe")

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

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

Solution (Python):
list = list(map(int, input().split()))
S = list[0]
W = list[1]
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=input().split(' ')
if int(s)<=int(w):
  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 = 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):
import math

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

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

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 w>=s:
  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().strip().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):

import sys


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

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

Solution (Python):
inputLine = input()

tempStr = inputLine.split(' ')

numSheep = int(tempStr[0])
numWolf = int(tempStr[1])


print("unsafe" if numWolf >= numSheep 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())


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

Solution (Python):
import sys
input = sys.stdin.readline
def print_ans(S, W):
    """Test Case
    >>> print_ans(4, 5)
    unsafe
    >>> print_ans(100, 2)
    safe
    >>> print_ans(10, 10)
    unsafe
    """
    if S > W :
         print('safe')
    else:
        print('unsafe')
if __name__ == '__main__':
    S, W = map(int, input().rstrip().split())
    print_ans(S, W)

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

Solution (Python):
s = input().split()

hitsuji = int(s[0])
ookami = int(s[1])

if (hitsuji > ookami):
  print('safe')
else:
  print('unsafe')

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

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

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

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

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

if(i[0]>i[1]):
  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('unsafe')
else:
    print('safe')

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):
def Main(S, W):
    return 'unsafe' if S <= W else 'safe'

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

if __name__ == '__main__':
    main()

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

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

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

Solution (Python):
num = map(int, input().split())
list1=[]
for i in num:
    list1.append(i)
if list1[0]<list1[1]:
    print("unsafe")
elif list1[0]>list1[1]:
    print("safe")
else:
    print("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())
print('unsafe') if a<=b else print('safe')

Solution (Python):
sw = [int(i) for i in input().split()]

if sw[0] >sw[1] :
    print('safe')
else:
    print('unsafe')

Solution (Python):
S, W = input().split(' ')
print('unsafe') if int(S) <= int(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 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):
import sys

input = sys.stdin.readline


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


if __name__ == '__main__':
    answer = solve()
    print(answer)

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 = 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 = 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):
import sys
input = sys.stdin.readline
def main():
    S, W = map(int, input().split())
    if W >= S:
        print("unsafe")
    else:
        print("safe")
if __name__ == "__main__":
    main()

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 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())
import math

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):
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 print("safe")

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

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

Solution (Python):
import math
import sys

stdin = sys.stdin

ns = lambda: stdin.readline().rstrip()
ni = lambda: int(stdin.readline().rstrip())
nm = lambda: map(int, stdin.readline().split())
nl = lambda: list(map(int, stdin.readline().split()))
mod = 10**9 + 7 
sys.setrecursionlimit(1000010)


S,W = nm()
A  = nl()

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

Solution (Python):
def main():
    x,y = tuple([int(t)for t in input().split()])

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

Solution (Python):

def Sol(s,w):
    
    if s>w:
        print("safe")
    else:
        print("unsafe")
    
    return

    


n,k = map(int,input().split())









Sol(n,k)

Solution (Python):
n,m=map(int,input().split())
def func(n,m):
    return "unsafe" if n<=m else "safe"
print(func(n,m))

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

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

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

Solution (Python):
if __name__ == "__main__":
    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('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):
line = input().split()
s=int(line[0])
w=int(line[1])
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(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):
L = list(map(int,input().split()))
S=L[0]
W=L[1]
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=[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 = list(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()))

is_attacked = W >= S
answer = 'unsafe' if is_attacked else 'safe'

print(answer)

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

Solution (Python):

import sys
input= lambda: sys.stdin.readline().rstrip()
def pin(type=int):return map(type,input().split())
def tupin(t=int):return tuple(pin(t))

def resolve():
    N,M=pin()
    cond=M<N
    print(["unsafe","safe"][cond])

resolve()

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

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

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

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

if int(s) <= int(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] = [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('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):
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):
import sys
sys.setrecursionlimit(1 << 25)
read = sys.stdin.readline
ra = range
enu = enumerate


def read_ints():
    return list(map(int, read().split()))


def read_a_int():
    return int(read())


def read_tuple(H):
    '''
    H is number of rows
    '''
    ret = []
    for _ in range(H):
        ret.append(tuple(map(int, read().split())))
    return ret


def read_col(H):
    '''
    H is number of rows
    A列、B列が与えられるようなとき
    ex1)A,B=read_col(H)    ex2) A,=read_col(H) 
    '''
    ret = []
    for _ in range(H):
        ret.append(list(map(int, read().split())))
    return tuple(map(list, zip(*ret)))


def read_matrix(H):
    '''
    H is number of rows
    '''
    ret = []
    for _ in range(H):
        ret.append(list(map(int, read().split())))
    return ret
    


MOD = 10**9 + 7
INF = 2**31  

from collections import defaultdict, Counter, deque
from operator import itemgetter
from itertools import product, permutations, combinations
from bisect import bisect_left, bisect_right  
from math import gcd
S, W = read_ints()
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("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):
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 = input().split()
s = int(s)
w = int(w)
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):
from heapq import *
import sys
from collections import *
from itertools import *
from decimal import *
import copy
from bisect import *
import time
import math
def gcd(a,b):
    if(a%b==0):return(b)
    return (gcd(b,a%b))
S,W=map(int,input().split())
if not 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):
k, n = map(int, input().split())

if k > n : 
  print("safe")
else:
  print("unsafe")

Solution (Python):
S,W=input().split()
S=int(S)
W=int(W)
if(1<=S<=100)and(1<=W<=100):
    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):
import sys
si = sys.stdin.readline


def main():
    l = [int(e) for e in si().split()]
    if l[0] <= l[1]:
        print('unsafe')
    else:
        print('safe')


if __name__ == '__main__':
    main()

Solution (Python):


S,W=(int(x) for x in input().split())

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

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

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

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


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

Solution (Python):


import sys

def input(): return sys.stdin.readline().strip()
def list2d(a, b, c): return [[c] * b for i in range(a)]
def list3d(a, b, c, d): return [[[d] * c for j in range(b)] for i in range(a)]
def list4d(a, b, c, d, e): return [[[[e] * d for j in range(c)] for j in range(b)] for i in range(a)]
def ceil(x, y=1): return int(-(-x // y))
def INT(): return int(input())
def MAP(): return map(int, input().split())
def LIST(N=None): return list(MAP()) if N is None else [INT() for i in range(N)]
def Yes(): print('Yes')
def No(): print('No')
def YES(): print('YES')
def NO(): print('NO')
sys.setrecursionlimit(10 ** 9)
INF = 10 ** 18
MOD = 10 ** 9 + 7

s, w  = MAP()

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):
import math



N, M = map(int, input().split())







if N>M:
    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 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):
a, b = [int(tmp) for tmp in input().split()]
if b>= a :
  print("unsafe")
else :
  print('safe')

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

Solution (Python):
if __name__ == "__main__":

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

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

if tmp[0] <= tmp[1]:
  print("unsafe")
else:
  print("safe")

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

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

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

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

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

Solution (Python):
S, W = [int(n) for n 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 W >= S:
  print('unsafe')
else:
  print('safe')

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

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

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

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

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

Solution (Python):
a, b = (int(x) for x in input().split())
if a > b:
    print('safe')
else:
    print('unsafe')

Solution (Python):
i = input().split()
S, W = int(i[0]), int(i[1])

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 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):
input_line = list(map(int,input().split()))

if input_line[0] <= input_line[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("unsafe")
else:
    print("safe")