# Exercise: collect packets

- You get a series of packets (e.g. lines in a file)
- In each line you have several fields: id, seqid, maxseq, content
- id is a unique identifier of a series of packets (lines)
- seqid is the seuence id of a packet in a series. (an integer)
- maxseq is the length of the sequence.
- content is the actual content.

In each iteration return a message that is built up from all the packages in the given sequence.

**examples/iterators/packets/packets.txt**

12,1,5,First of Twelve 12,2,5,Second of Twelve 12,3,5,Third of Twelve 12,4,5,Fourth of Twelve 12,5,5,Fifth of Twelve 9,1,4,First of Nine 9,2,4,Second of Nine 9,3,4,Third of Nine 9,4,4,Fourth of Nine 11,1,3,First of Eleven 11,2,3,Second of Eleven 11,3,3,Third of Eleven

['First of Twelve', 'Second of Twelve', 'Third of Twelve', 'Fourth of Twelve', 'Fifth of Twelve'] ['First of Nine', 'Second of Nine', 'Third of Nine', 'Fourth of Nine'] ['First of Eleven', 'Second of Eleven', 'Third of Eleven']

**examples/iterators/packets/packets1.txt**

12,1,5,First of Twelve 11,1,3,First of Eleven 9,1,4,First of Nine 12,2,5,Second of Twelve 9,2,4,Second of Nine 11,2,3,Second of Eleven 12,3,5,Third of Twelve 9,3,4,Third of Nine 12,4,5,Fourth of Twelve 12,5,5,Fifth of Twelve 9,4,4,Fourth of Nine 11,3,3,Third of Eleven

**examples/iterators/packets/packets2.txt**

11,2,3,Second of Eleven 11,1,3,First of Eleven 9,1,4,First of Nine 12,1,5,First of Twelve 9,3,4,Third of Nine 9,2,4,Second of Nine 12,3,5,Third of Twelve 12,4,5,Fourth of Twelve 12,2,5,Second of Twelve 12,5,5,Fifth of Twelve 9,4,4,Fourth of Nine 11,3,3,Third of Eleven