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  1. # your co
  2. s=input()
  3. a=[]
  4. a.append(s[0])
  5. for i in range(2,len(s)):
  6. if i%2==0:
  7. a.append(s[i])
  8. a.sort()
  9. for i in range(len(a)):
  10. print(a[i]+"+")
Success #stdin #stdout 0.02s 9192KB
stdin
3+2+4+1
stdout
1+
2+
3+
4+