You are given two integers a and b. Determine if a + b = 15 or a * b = 15 or neither holds. Note that a + b = 15 and a * b = 15 do not hold at the same time.

Constraints:
- 1 ≤ a, b ≤ 15
- All values in input are integers.

Input:
Input is given from Standard Input in the following format:
a b

Output:
If a + b = 15, print "+";
if a * b = 15, print "*";
if neither holds, print "x".

Sample Input 1:
4 11

Sample Output 1:
+
4+11=15.

Sample Input 2:
3 5

Sample Output 2:
*
3 * 5 = 15.

Sample Input 3:
1 1

Sample Output 3:
x
1+1=2 and 1 * 1=1, neither of which is 15.

# Buggy version:
#!/usr/bin/env python3
from collections import defaultdict,deque
from heapq import heappush, heappop
from bisect import bisect_left, bisect_right
import sys, random, itertools, math
sys.setrecursionlimit(10**5)
input = sys.stdin.readline
sqrt = math.sqrt
def LI(): return list(map(int, input().split()))
def LF(): return list(map(float, input().split()))
def LI_(): return list(map(lambda x: int(x)-1, input().split()))
def II(): return int(input())
def IF(): return float(input())
def S(): return input().rstrip()
def LS(): return S().split()
def IR(n): return [II() for _ in range(n)]
def LIR(n): return [LI() for _ in range(n)]
def FR(n): return [IF() for _ in range(n)]
def LFR(n): return [LI() for _ in range(n)]
def LIR_(n): return [LI_() for _ in range(n)]
def SR(n): return [S() for _ in range(n)]
def LSR(n): return [LS() for _ in range(n)]
mod = 1000000007
inf = 1e10

#solve
def solve():
    a, b = LI()
    if a + b == 15:
        print("+")
        return
    if a * b == 15:
        print("*")
        return
    print("×")
    return


#main
if __name__ == '__main__':
    solve()


# Fixed version:
#!/usr/bin/env python3
from collections import defaultdict,deque
from heapq import heappush, heappop
from bisect import bisect_left, bisect_right
import sys, random, itertools, math
sys.setrecursionlimit(10**5)
input = sys.stdin.readline
sqrt = math.sqrt
def LI(): return list(map(int, input().split()))
def LF(): return list(map(float, input().split()))
def LI_(): return list(map(lambda x: int(x)-1, input().split()))
def II(): return int(input())
def IF(): return float(input())
def S(): return input().rstrip()
def LS(): return S().split()
def IR(n): return [II() for _ in range(n)]
def LIR(n): return [LI() for _ in range(n)]
def FR(n): return [IF() for _ in range(n)]
def LFR(n): return [LI() for _ in range(n)]
def LIR_(n): return [LI_() for _ in range(n)]
def SR(n): return [S() for _ in range(n)]
def LSR(n): return [LS() for _ in range(n)]
mod = 1000000007
inf = 1e10

#solve
def solve():
    a, b = LI()
    if a + b == 15:
        print("+")
        return
    if a * b == 15:
        print("*")
        return
    print("x")
    return


#main
if __name__ == '__main__':
    solve()

# Buggy version:
a,b=map(int,input().split(' '))
print('+') if a+b==15 else print('*') else a*b==15 else print('x')

# Fixed version:
a,b=map(int,input().split());print("+"if a+b==15 else"*"if a*b==15else"x")

# Buggy version:
a,b=map(int,input().split());print("x*+"[(a*b==15)+(a+b==15)*2]

# Fixed version:
a,b=map(int,input().split());print('x+*'[(a+b==15)+2*(a*b==15)])

# Buggy version:
n = list(map(int, input().split()))
if(n[0] + n[1] == 15):
    print("+")
elif(n[0] * n[1] == 15):
    print("*")
else:
    print("X")


# Fixed version:
n = list(map(int, input().split()))
if(n[0] + n[1] == 15):
    print("+")
elif(n[0] * n[1] == 15):
    print("*")
else:
    print("x")

# Buggy version:
from sys import stdin
from itertools import groupby
a,b = [int(x) for x in stdin.readline().rstrip().split()]
if a+b == 15:
    print("+")
elif a*b == 15:
    print("*")
else:
    print("X")

# Fixed version:
from sys import stdin
a , b = [int(x) for x in stdin.readline().rstrip().split()]
if a + b == 15:
    print("+")
elif a * b == 15:
    print("*")
else:
    print("x")

# Buggy version:
a, b = list(map(int, input().split()))
if (a + b == 15):
  print("+")
else if (a * b == 15):
  print("*")
else:
  print("x")

# Fixed version:
a,b=list(map(int,input().split(' ')));print('+' if a+b==15 else '*' if a*b==15 else 'x')

# Buggy version:
a,b=map(int,input().split())
if a*b==15 and a+b==15:
  print("*")
else:
  print("x")

# Fixed version:
a, b = map(int, input().split())
if a + b == 15:
    print('+')
if a*b == 15:
    print('*')
if a + b !=15 and a * b != 15:
    print('x')

# Buggy version:
l = raw_input().split()
if int(l[0])+int(l[1])==15:
    print('+')
elif int(l[0])*int(l[1]) ==15:
    print('*')
else:
    print('x')

# Fixed version:
l = input().split()
if int(l[0])+int(l[1])==15:
    print('+')
elif int(l[0])*int(l[1]) ==15:
    print('*')
else:
    print('x')

# Buggy version:
a,b=[int(x) for x in input()]
if a+b==15:
    print("+")
elif a*b==15:
    print("*")
else:
    print("x")

# Fixed version:
a, b = [int(x) for x in input().split()]

if a + b == 15:
    print('+')
elif a * b == 15:
    print('*')
else:
    print('x')

# Buggy version:
a,b = int(input().split())
if a+b==15:
  print('+')
elif a*b == 15:
  print('*')
else:
  print('x')

# Fixed version:
stra, strb = input().split()
a = int(stra)
b = int(strb)

if a+b == 15:
    print('+')
elif a*b == 15:
    print('*')
else:
    print('x')

# Buggy version:
a, b = map(int, input().split())
if a+b == 15:
    print("+")
    if a*b == 15:
        print("*")
    else:
        print("x")

# Fixed version:
a,b=map(int,input().split())
if a+b==15:
    print("+")
    exit()
if a*b==15:
    print("*")
    exit()
print("x")

# Buggy version:
a = input()
b = a.split()

if(b[0] + b[1] == 15):
    print('+')
elif(b[0] * b[1] == 15):
    print('*')
else:
    print('x')

# Fixed version:
s=input().split()
a=int(s[0])
b=int(s[1])
if a+b==15:
    print("+")
elif a*b==15:
    print("*")
else:
    print("x")

# Buggy version:
[a,b]=[int(i) for i in input().split()]
if a*b=15:
    print("*")
elif a+b=15:
    print("+")
else:
    print("x")


# Fixed version:
a,b=[int(i) for i in input().split()]
if a+b==15:
    print("+")
elif a*b==15:
    print("*")
else:
    print("x")

# Buggy version:
a, b = map(int, input().split())
if a* b == 15:
    print("*")
elif a+ b == 15:
    print("+")
else:
    print(x)

# Fixed version:
a, b = list(map(int, input().split()))
if a+b==15:
    print('+')
elif a*b==15:
    print('*')
else:
    print("x")