public CustomSeparatorOperationExpression(string input, SeparatorExpressionDefinition definition)
        {
            var expression = new CustomSeparatorExpression(input, definition);

            SepartorList = expression.Value;
            var operationInput = input.Substring(FirstOccurranceOfDigit(input));

            Numbers = ExtractNumbers(operationInput, SepartorList);
        }
 public CustomSeparatorOperationInput(string numberInput, SeparatorExpressionDefinition customSeparatorDefinition)
 {
     OperationExpression = new CustomSeparatorOperationExpression(numberInput, customSeparatorDefinition);
 }