I don't think there is really an exact rule about this. Here's what the Russian Self Teaching Guide has to say:
"Many nouns of more than one syllable ending in -ец and -ок behave in this way."
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Type: Posts; User: paulb; Keyword(s):
I don't think there is really an exact rule about this. Here's what the Russian Self Teaching Guide has to say:
"Many nouns of more than one syllable ending in -ец and -ок behave in this way."
...
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