We have data:
Let me is list all known first-digit=2. Need 7 rows? Only got 26277, 26275, 26262, 26246.
Continue search for earlier periods: 26245=12502 first digit 1 no. Need earlier ones. Let's find more periods.
26251=23771 first digit 2.
26246=28665 first digit 2.
Need 2 more. Search maybe 26245 backwards.
Let me find more periods with first digit 2. We have:
26277: 27855 → first digit 2, first three digits are 2,7,8 distinct → group is 组六. Its next period 26278 = 58383 → first three digits 583 all distinct = 组六.
26275: 20666 first digit 2.
26262: 27302 first digit 2.
26246: 28665 first digit 2.
Need more. Let me search for more earlier periods to find additional ones.
Let me search for more data.

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