The robots are invading (your written work)! Robots are sneaking into your text files. Write a program that reads in a line of text from the user and prints out whether there is a robot in the line of text. 
- If the word robot occurs in all lowercase letters in the line, If the word ROBOT occurs in all uppercase letters in the line, 
- If the word robot occurs in the line in any combination of upper print out: There is a small robot in the line. print out: There is a big robot in the line. and lowercase letters, print out: There is a medium sized robot in the line. 
- Otherwise, if none of these conditions hold true, you should print out: No robots here. 
Your program should work like this: 
Line: I'm baking chocolate robot brownies There is a small robot in the line. 
Here is another example: 
Line: Look at the roBOt down the road There is a medium sized robot in the line. 
If the letters robot occur in the line, but as part of a bigger word, you should not report any robots found. 
Line: There's a strobotron at the concert. No robots here.