Public Class Main  
  Public Shared Sub Main(ByVal args() As String)
        
    Dim tmp As String
    tmp = Console.ReadLine()
'    Console.writeLine(tmp)
    
    Dim a As Integer = tmp.Length()
'    Console.writeLine(a)
        
    Dim i As Integer
    Dim ans As String
    For i = 1 To a
    ans = ans & "x"
  Next i
  Console.writeLine(ans)
  
  End Sub
End Class
