| 摘要 |
A method and a computer readable medium having executable instructions are provided. The method and instructions when executed generates a first look-up key from a group of look-up key units stored in a data storage, generation of the first look up key being completed prior to the completion of a key generation processing cycle. A next look-up key unit from the group of look-up key units stored in the data storage may be skipped over when the next look up key corresponds to a second look-up key that has a key length equal to or smaller than a predetermined key length. A third look-up key unit may be selected from the group of look-up key units, the third look-up key unit associated with a third look-up key having a key length greater than a second predetermined key length, the second predetermined key length being greater than the first predetermined key length. The first look-up key and a portion of the third look-up key sequentially may be output during the same output processing cycle.
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