Defect description:
If only one input is given(as second unary value) ,it should show the message as "Another input is required!!!!",but instead it's performing the operation as if first unary input is also given and landing up with a page which recursively decreasing the count value .
Steps to reproduce the issue :
Data structures lab -> List of Experiments -> Number Systems -> Simulation -> Unary systems
Defect description: If only one input is given(as second unary value) ,it should show the message as "Another input is required!!!!",but instead it's performing the operation as if first unary input is also given and landing up with a page which recursively decreasing the count value .
Steps to reproduce the issue : Data structures lab -> List of Experiments -> Number Systems -> Simulation -> Unary systems
Test step link: http://cse01-iiith.vlabs.ac.in/exp1/Simulation.html?domain=Computer%20Science&lab=Data%20Structures#
Expected result: Message showing "Another input is required",should be displayed on the screen.
Actual result: It's landing up with a page which recursively decreasing the count value.
Screen shot:
![Screenshot from 2019-03-18 16-54-25](https://user-images.githubusercontent.com/47271999/54489760-9960c280-48d5-11e9-96e5-c8f05c038173.png)