Write a program that reads the contents of a text file. The program should create a dictionary in which the key$-$value pairs are described as follows:

Key. The keys are the individual words found in the file.

Values. Each value is a list that contains the line numbers in the file where the word $($the key$)$ is found.

For example, suppose the word "robot" is found in lines $7,18,94,$ and $138.$ The dictionary would contain an element in which the key was the string "robot", and the value was a list containing the numbers $7,18,94,$ and $138.$

ndex.txt