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start_letters

Language/Type: Python collections dict

Write a function named start_letters that accepts a file name as a parameter, reads this text file, and produces a dictionary of counters based on what character each word in the file starts with, case-insensitively. For example, if the file contains the text "to be or not to be", your dictionary would store {"b": 2, "n": 1, "o": 1, "t": 2}. Print the mappings in sorted order in the following format. You may assume that every word token in the file begins with a letter from A-Z in upper or lowercase. 

b 2
n 1
o 1
t 2
Function: Write a Python function as described, not a complete program.

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