List <char> CreateTable(string key)
{
key = key.ToUpper();
List <char> tempList = new List <char>();
List <char> alphbtList = getAlphbt();
tempList = key.Distinct().ToList(); // remove duplicates char from key
for (int i = 0; i < tempList.Count; i++) //compare key char and alphbet char and remove duplicates char
{
for (int j = 0; j < alphbtList.Count; j++)
{
if (tempList[i] == alphbtList[j])
{
alphbtList.Remove(alphbtList[j]);
}
}
}
foreach (var item in alphbtList)
{
tempList.Add(item);
}
return(tempList);
}