Keep the longest chains

[nilamo]

And he gives me this result:

['1 2 3 4 5', '1 2 3 4 5 6']
['4 5 2 1', '4 5 2 1 8 9', '4 5 2 1 8']
['7 8 9', '7 8 9 10', '7 8 9 10 11', '7 8 9 45 16', '7 8 9 45']

It's ok for the first two lines, however for the last one, the channels 7 8 9 45 16 and 7 8 9 45 are too much (they should be in a separate list).

Why would they be in a separate list? They're both part of the 7 8 9 chain.