import itertools
n = int(input())
t = int(input())
a = input().split()

k = ('+', '*')
for i in itertools.product(k, repeat = n - 1):
    t2 = int(a[0])
    for j in range(0 , n - 1):
        if(i[j] == '+'):
            t2 += int(a[j + 1])
        else:
            t2 *= int(a[j + 1])
        if(t2 > t):
            break
    if(t2 == t):
        ans = ""
        for k in range(0 , n - 1):
            ans += i[k]
        print(ans)
        break