ı need help for my trip (20 decem until 2 january) (Prague)

hi all viena people ; ı need your all help .I will visit viena,prague and budapeşte as much ası can do in this time 10 days .I want to be there at chrismas and new year at abroad gona be my frirst time abroad.actuall I will flight to viena and come back form viena again because flight more chepaer than other place . I can not decide to make my way where should ı start and go as al line .if you have a good idea pleas share with me when I make my travel ,. I am also so intrested to meet local and other foreigner people .if you are intrested for it pleas contact with me .I am open mind all things.
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I am looking forward waiting your reply

dear fırat