John the Ripper password cracker: password must contain string

I'm practicing with John the Ripper password cracker and right now I try to crack a password from a zipfile. I wonder if it's possible to add a rule saying: password must contain this string eg. "chiCKen" so that it will try all combinations but try the exact string "chiCKen" everywhere.So that it will be like (where a = variable)chiCKenaaaaaaachiCKenaaaaaaachiCKenaaaaect.I tried searching the community resources, but I couldn't find it. If you know any other password cracker that can do this, that advise is also welcome.Thank you by HowToHack on Reddit.com John the Ripper password cracker: password must contain string - I'm practicing with John the Ripper password cracker and right now I try to crack a password from a zipfile. I wonder if it's possible to add a rule saying: password must contain this string eg. "chiCKen" so that it will try all combinations but try the exact string "chiCKen" everywhere.So that it will be like (where a = variable)chiCKenaaaaaaachiCKenaaaaaaachiCKenaaaaect.I tried searching the community resources, but I couldn't find it. If you know any other password cracker that can do this, that advise is also welcome.Thank you

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