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In January , the hacker collected an unspecified Bitcoin reward for reporting a bug to the AlphaBay staff that would have allowed an attacker access to over 218,000 private messages .
 discover vulnerability: reporting
Please tell me event type and its trigger word from given type options. Output format is "type: trigger".  Option: phishing, data breach, ransom, discover vulnerability, patch vulnerability 
Text: {0} 
Answer:
 discover vulnerability: reporting