Write a python program that traverses through an input string and prints its characters indifferent lines – two characters per line

Sure, here is a simple Python program that does that:

def print_chars(input_string):
    for i in range(0, len(input_string), 2):
        print(input_string[i:i+2])

# Test the function
print_chars('Hello, World!')

This program defines a function print_chars that takes an input string. It then loops over the string, taking two characters at a time (this is what input_string[i:i+2] does), and prints them. The range(0, len(input_string), 2) part means "start at 0, go up to the length of the string, and increase by 2 each time", which is how we get two characters at a time.