Human: Write me a Python function to what goes through the letters in a string. Assistant: 
Here is a Python function to what goes through the letters in a string

import string

def go_through_letters(string):
    """What's a python function for what function goes through the letters in a string?"""
    for letter in string:
        print(letter)

# Enter the string
string = "abc"

# Calling the function
print((go_through_letters(string)))

#Example Output

# a
# b
# c
# None

#Remember to inspect code for bugs.