//find Closest permutation
internal Matching FindClosest(string text, out Permutation perm)
{
Permutation tmp = new Permutation(text);
return(tree.SearchClosest(tmp, out perm));
}
//return if the Permutation Exist
internal bool PermExist(string text, out Permutation perm)
{
Permutation tmp = new Permutation(text);
return(tree.Search(tmp, out perm));
}