N = input()
T = input()
A = map(int,raw_input().split())
dp = {A[0]:""}
for i in xrange(1,N):
	tmp_dp = {}
	for k,v in dp.iteritems():
		for nk,nv in [(k+A[i],v+"+"),(k*A[i],v+"*")]:
			if nk <= T and (nk not in tmp_dp or tmp_dp[nk] < nv):
				tmp_dp[nk] = nv
	dp = tmp_dp
print dp[T] if T in dp else -1