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#!/usr/bin/perl
#ver 2.00
...
    store $db, 'dictionary.db';
    return retrieve('dictionary.db');
}

love-lose-lost-loot-soot-shot-shit
love->lore->sore->sort->soot->shot->shit
...
            Rate find_path transform
find_path 6.76/s        --      -94%
transform  108/s     1505%        --