Let say you have a digital indicator which consists of seven lights as you see below. You are trying to make as many distinct digits as possible but there are two requirements for that:

* At least one light should be on to be counted as a shape.
* If more than one light is on, all lights are supposed to be connected directly or indirectly. (for example, all numbers in digital form are counted as digits.)

[![enter image description here](https://i.stack.imgur.com/1N4ZN.jpg)](https://i.stack.imgur.com/1N4ZN.jpg)

So, how many digits can you create with only one digital indicator?