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Gagarin was a candidate favoured by his peers; when they were asked to vote anonymously for a candidate besides themselves they would like to be the first to fly, all but three chose Gagarin. One of these candidates, Yevgeny Khrunov, believed that Gagarin was very focused and was demanding of himself and others when necessary. On 30 May 1960, Gagarin was further selected for an accelerated training group, known as the Vanguard Six or Sochi Six, from which the first cosmonauts of the Vostok programme would be chosen. The other members of the group were Anatoly Kartashov, Andriyan Nikolayev, Pavel Popovich, Gherman Titov, and Valentin Varlamov. However, Kartashov and Varlamov were injured and replaced by Khrunov and Grigory Nelyubov.