import collections

def dfs(memo, a, j, s, t, res):
    if j == len(a) - 1:
        if s == t:
            return True
        else:
            return False
    if s in memo[j]:
        return False

    memo[j].add(s)
    if dfs(memo, a, j + 1, s + a[j + 1], t, res):
        res.append('+')
        return True
    if dfs(memo, a, j + 1, s * a[j + 1], t, res):
        res.append('*')
        return True
    else:
        return False

n = int(input())
t = int(input())
a = [int(x) for x in input().split()]

memo = []
for i in range(n):
    memo.append(set())

res = []

dfs(memo, a, 0, a[0], t, res)

res.reverse()
print(''.join(res))