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do { $letraale=((65..90) + (97..122) | Get-Random -Count 1 | % {[char]$_}) $inicio=Get-Date $tuletra=Read-Host $letraale $fin=Get-Date (New-TimeSpan -Start $inicio -End $fin).TotalMilliseconds }while([char]$letraale -ceq [char]$tuletra) |