n,t,*a=$<.read.split.map &:to_i
n-=1
s=a*'%s'
class Integer;alias:-:*end
(1<<n).times.any?{|i|p k=n.times.map{|j|'+-'[i[j]]}.reverse;eval(s%k)==t&&$><<(k*'').tr(?-,?*)}