public Balda(ILettersSet lettSer, int fieldSize = 5)
{
_commonTree = new TrieTree(lettSer);
_invertedPrefixTree = new TrieTree(lettSer);
_lettSet = lettSer;
_fieldSize = fieldSize;
_grid = GetEmptyGrid(fieldSize);
_visited = new bool[fieldSize, fieldSize];
}
public TrieTree(ILettersSet set)
{
_lettSet = set;
_next = new TrieTree[set.Count];
}