"user1, user2 and 3 more online"

chatroom_status([]) ➞ "no one online"

chatroom_status(["paRIE_to"]) ➞ "paRIE_to online"

chatroom_status(["s234f", "mailbox2"]) ➞ "s234f and mailbox2 online"

self.assertEqual(chatroom_status([]), "no one online")
self.assertEqual(chatroom_status(["paRIE_to"]), "paRIE_to online")
self.assertEqual(chatroom_status(["s234f", "mailbox2"]), "s234f and mailbox2 online")
self.assertEqual(chatroom_status(["pap_ier44", "townieBOY", "panda321", "motor_bike5", "sandwichmaker833", "violinist91"]), "pap_ier44, townieBOY and 4 more online")
self.assertEqual(chatroom_status(["becky325", "malcolm888", "fah32fa"]), "becky325, malcolm888 and 1 more online")
self.assertEqual(chatroom_status(["becky325"]), "becky325 online")
self.assertEqual(chatroom_status(["becky325", "malcolm888"]), "becky325 and malcolm888 online")

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