The program reads from standard input, in this order: - a natural number `n1`, followed by `n1` integers (the first sequence); - a natural number `n2`, followed by `n2` integers (the second sequence); - a natural number `n3`, followed by `n3` integers (the third sequence). - `1 <= n1, n2, n3 <= 1000` - `-1000000 <= values <= 1000000` - the sequences are sorted in ascending order and may contain duplicates

The program prints to standard output, on a single line, the `n1 + n2 + n3` values in ascending order, separated by single spaces, followed by a newline. When two minima are equal, the value from the first sequence is preferred, then the value from the second sequence.