t=list(map(int,input().split()))
unsolveable=False
for e,i in enumerate(imos(t)):
  if t[e]==-1:
    unsolveable=True
  if 6000-i<0 and not unsolveable:
    print(-1)
  else:
    if unsolveable:
      print(-1)
    else:
      print(6000-i)