on *:TEXT:*.tb*:#: {
  if $address($nick,2) == $address($me,2) {
    set %4 $2 | $2 == $nick
    cs ban # %4 15,1 You have been banned for4 $3 15minute(4s15):4 $4- $+ 3
    timer 1 $calc($3 * 60) cs unban # %4
  }
}
}

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Example:
Hankj: .tb Failure 5 You suck.