第 3506371 期
2 + 3 + 7 + 2 + 7 = 21
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| 万 | 12 + 25 + 31 + 44 | = 112 → 2 |
|---|---|---|
| 千 | 15 + 27 + 35 + 66 | = 143 → 3 |
| 百 | 22 + 28 + 36 + 71 | = 157 → 7 |
| 十 | 23 + 29 + 42 + 78 | = 172 → 2 |
| 个 | 24 + 30 + 43 + 80 | = 177 → 7 |