6. Anya, Galia, Dasha, Sonya, and Lena arrived at the "Formula of Unity" camp from different cities: Kursk, Vologda, Novorossiysk, Petrozavodsk, and Cheboksary. Introducing themselves to other members of the team, they shared the following information. Sonya and Dasha have never been to Kursk. Galia and Sonya were in the same camp last year with a girl from Novorossiysk. Anya and Sonya gave a souvenir to the girl from Cheboksary. Galia and Sonya helped the girl from Vologda carry her things to the room. Galia and Lena chat with the girl from Cheboksary on Skype, while the girl from Novorossiysk communicates with Anya on VKontakte. Who lives where?
6. 7) Anya and Sonya are not from Cheboksary, Galia and Lena are also not from Cheboksary. Therefore, Dasha lives in Cheboksary.
2) Galia and Sonya are not from Novorossiysk, Anya is not from Novorossiysk, so Lena lives there.
3) Galia and Sonya are not from Vologda, so Anya lives there.
4) Sonya (and Dasha) are not from Kursk, so Galia lives in Kursk, and Sonya lives in Petrozavodsk. Answer: Anya is from Vologda, Galia is from Kursk, Dasha is from Cheboksary, Sonya is from Petrozavodsk, Lena is from Novorossiysk.