N = input()
total = input()
A = map(int, raw_input().split())

limits = [0 for _ in xrange(N)]
limits[N-1] = total-A[N-1]
for i in xrange(N-2, -1, -1):
    limits[i] = limits[i+1]-A[i]

mem = {}
def rec(p, acm, ops):
    if p >= N:
        return ops if acm == total else False
    if acm > limits[p]:
        return False
    a = rec(p+1, acm+A[p], ops+'+')
    if a:
        mem[(p, acm)] = a
        return a
    a = rec(p+1, acm*A[p], ops+'*')
    if a:
        mem[(p, acm)] = a
        return a
    return False
print rec(1, A[0], '')