public NumberSystem(NumberAlphabet numberAlphabet, FirstSymbolType firstSymbolType, bool firstSymbolCollapses, string description = default(string))
 {
     NumberAlphabet = numberAlphabet;
     FirstSymbolType = firstSymbolType;
     FirstSymbolCollapses = firstSymbolCollapses;
     Description = description;
 }
 public NumberSystem(NumberAlphabet numberAlphabet, string description)
 {
     NumberAlphabet = numberAlphabet;
     Description = description;
 }