N = int(input())
T = int(input())
A = list(map(int, input().split()))
D = {A[0]: ""}
for i in range(1, N):
    E = {}
    for K, V in D.items():
        for L, W in[(K + A[i], V + "+"), (K * A[i], V + "*")]:
            if L <= T and(L not in E or E[L] < W): E[L] = W
    D = E
print([-1, D[T]][T in D])