title: How to remove letters?
body: <p>i just wanna ask:
  i have a label40.text 
  with a content of {a,b,c,d,e,f,g,h,i,j,k,l,m,n,o,p,q,r,s,t,u,v,w,x,y,z}
  and i also have have a label39.text that will change its output everytime a certain changes happens.</p>
  
  <p>My question is
  How can i embed this simulation through a code?</p>
  
  <p>If Label39.text = "a" then the content of label40.text "a" will be remove and the list of alphabets will be remain alphabetically.</p>
  
  <p>I want that also to be happen anytime my label39.text will change its value "RANDOMLY"</p>
  
  <p>Example if label39.text = "a,b,c,d,x,z" then
  label40.text = "e,f,g,h,i,j,k,l,m,n,o,p,q,r,s,t,u,v,w,x,y"</p>
  
  <p>this is my code so far</p>
  
  <pre><code>Dim patterns As String
          patterns = Label39.Text
          Dim tobefollow As String
          tobefollow = Label40.Text
          Dim matches As MatchCollection = Regex.Matches(patterns, tobefollow)
          If Regex.IsMatch(patterns, tobefollow) Then
                 'this where i will put my code to make my example 
          End If
  </code></pre>