Is it possible for a pair of computers to be linked directly by more
than one connection?

e.g. for input
3 2

Is the following an acceptable output?

1 2
2 3
2 3

Or is the output -1 ?

Thanks.

The output IS -1.

Sorry, just got 3 WAs because of this.

> Is it possible for a pair of computers to be linked directly by
more
> than one connection?
>
> e.g. for input
> 3 2
>
> Is the following an acceptable output?
>
> 1 2
> 2 3
> 2 3
>
> Or is the output -1 ?
>
> Thanks.