I will give you two strings. I want you to transform stringOne into stringTwo one letter at a time.
Example:
from collections import OrderedDict

def mutate_my_strings(s1,s2):
    return '\n'.join(OrderedDict.fromkeys((s2[:i] + s1[i:] for i in range(len(s1) + 1)))) + '\n'
from collections import OrderedDict

def mutate_my_strings(s1,s2):
    return '\n'.join(OrderedDict.fromkeys((s2[:i] + s1[i:] for i in range(len(s1) + 1)))) + '\n'