complete paths and file parts of session04 assignment

These are the first two parts of the last session04 assignment, but does not include the "dict" changes to mailroom
you create the list, the use the dict() constructor to make a dict out of that:

In [9]: l1
Out[9]: ['a', 'k', 'f', 'l', 's', 'd', 'n', 'k', 'd', 'a', 's', 'u', 'i']

In [10]: l2
Out[10]: [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12]

In [11]: dict(zip(l2,l1))
Out[11]: 
{0: 'a',
 1: 'k',
 2: 'f',
 3: 'l',
 4: 's',
 5: 'd',
 6: 'n',
 7: 'k',
 8: 'd',
 9: 'a',
 10: 's',
 11: 'u',
 12: 'i'}