How does Filter come up with the Junzi number in a set of numbers?

for example, if there is a set of numbers such as 1, 2, 5, 7, 11, 14, how can Filter come up with two sets of numbers: [1, 2] and [5, 6, 7, 7]?
ask for advice

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Mar.05,2021

is this all right? 

  
 result correction.

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MySQL Query : SELECT * FROM `codeshelper`.`v9_news` WHERE status=99 AND catid='6' ORDER BY rand() LIMIT 5
MySQL Error : Disk full (/tmp/#sql-temptable-64f5-1e4548a-44b1f.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1e4548a-44b1f.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
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