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## CS 116 Assignment 9, Question 5

## Darren Poon

## (read_cipher)
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## Conctract: read_cipher: string -> dictionary

## Purpose: the function that consumes a string and produces a dictionary containing the transformation. That is, if the file contained the line A->X, the produced dictionary should have an entry with key 'A' and value 'X'

## Examples:

## Definition:
def read_cipher(filename):

## No additional test is needed