def string_changer(arg_a,arg_b,arg_c):

    for letter in arg_a:
        if letter






arg_a = str(input("Enter the original string: "))
arg_b = str(input("What would you like to change?: "))
arg_c = str(input("What would you like to change it to?: "))



string_changer(arg_a,arg_b,arg_c)