# difflib_ndiff.py

# difflib_ndiff.py

import difflib

case=[("IsN't Pyth0n GrEaT?", 'Python Is Great!')]

for a,b in case:
    print('{} >>> {}'.format(a,b))
    aaa = list(a)
    bbb = list(b)
    print(''.join(aaa))
    for i,s in enumerate(difflib.ndiff(a, b)):
        if s[0]==' ': continue
        elif s[0]=='-':
            aaa[i] = ''
        elif s[0]=='+':
            aaa.insert(i, s[-1])
        print(''.join(aaa))
    print('')