def f()
  a,b,c = gets.split.map(&:to_i)
  s = 10**10
  for i in 0..a do
    for j in 0..b do
      if i + j == 0
        next
      end
      t = i + j * 10
      for k in 1..t do
        r = t - k
        an, bn = a - i + r % 10, b - j + r / 10
        if an + bn == c
          s = [s, t-r].min
        end 
      end
    end
  end
  return s < 10**10 ? s : "Impossible"
end

puts f()