diff --git a/Students/RPerkins/session04/dict_setlab.py b/Students/RPerkins/session04/dict_setlab.py
new file mode 100644
index 00000000..eefb49be
--- /dev/null
+++ b/Students/RPerkins/session04/dict_setlab.py
@@ -0,0 +1,51 @@
+__author__ = 'Robert W. Perkins'
+
+
+d = {'name': 'Chris', 'city': 'Seattle', 'cake': 'Chocolate'}
+print d
+d.pop('cake')
+print d
+d['fruit'] = 'Mango'
+print d
+print d.keys()
+print d.values()
+print 'cake' in d
+print 'Mango' in d.values()
+
+int_list = []
+hex_list = []
+for i in range(16):
+    int_list.append(i)
+    hex_list.append(hex(i))
+
+h_ex={}
+for k, l in zip(int_list, hex_list):
+    h_ex[k] = l
+print h_ex
+
+d_prime = {}
+for k, v in d.items():
+    d_prime[k] = v.count('t')
+print d_prime
+
+s2 = set()
+s3 = set()
+s4 = set()
+for k in range(20):
+    if k % 2 == 0:
+        s2.update([k])
+    if k % 3 == 0:
+        s3.update([k])
+    if k % 4 == 0:
+        s4.update([k])
+print s2
+print s3
+print s4
+print s3.issubset(s2)
+print s4.issubset(s2)
+
+p_set = {'P', 'y', 't', 'h', 'o', 'n'}
+p_set.update(['i'])
+m_set = frozenset(('m', 'a', 'r', 'a', 't', 'h', 'o', 'n'))
+print p_set.union(m_set)
+print p_set.intersection(m_set)
diff --git a/Students/RPerkins/session04/file_copier.py b/Students/RPerkins/session04/file_copier.py
new file mode 100644
index 00000000..85656b2a
--- /dev/null
+++ b/Students/RPerkins/session04/file_copier.py
@@ -0,0 +1,7 @@
+__author__ = 'Robert W. Perkins'
+
+from_file = './test.txt'
+to_file = './test/testcopy.txt'
+
+indata = open(from_file).read()
+open(to_file, 'w').write(indata)
diff --git a/Students/RPerkins/session04/kata14.py b/Students/RPerkins/session04/kata14.py
new file mode 100644
index 00000000..68f19861
--- /dev/null
+++ b/Students/RPerkins/session04/kata14.py
@@ -0,0 +1,84 @@
+__author__ = 'Robert W. Perkins'
+import random
+
+
+def get_book(target):
+    """ Open target file and read contents into book_data"""
+    f = open(target)
+    book_data = f.read()
+    f.close()
+    return book_data
+
+
+def strip_newlines(in_text):
+    """ Replace newlines with spaces"""
+    return in_text.replace('\n', ' ')
+
+
+def mk_wordlist(in_list):
+    """Split input string at spaces and return word list"""
+    return in_list.split(' ')
+
+
+def create_dict(orig_text):
+    """ Create trigram dictionary"""
+    trigram = {}
+    word_list = mk_wordlist(strip_newlines(orig_text))
+    for idx, word in enumerate(word_list):
+        if idx > (len(word_list) - 3):
+            break
+        else:
+            trigram_key = '%s %s' % (word_list[idx], word_list[idx + 1])
+            if trigram_key in trigram:
+                trigram[trigram_key].append(word_list[idx + 2])
+            else:
+                trigram[trigram_key] = [word_list[idx + 2]]
+    return trigram
+
+
+def get_randomkey(t_gram):
+    """Return a random key"""
+    return random.choice(list(t_gram.keys()))
+
+
+def get_newword(word_key, word_dict):
+    """Return a random word from the list at the provided key"""
+    new_wordlist = word_dict.get(word_key)
+    return random.choice(new_wordlist)
+
+
+def create_newbook(trigram_dict, word_limit, w_line):
+    """Create random output of num_words words, using trigram_dict keys to generate new words"""
+    start_key = get_randomkey(trigram_dict)
+    new_word = get_newword(start_key, trigram_dict)
+    out_list = start_key.split(' ')
+    out_list.insert(0, '...')
+    out_list.append(new_word)
+    left_frame = 0
+
+    for i in range(word_limit):
+        for j in range(w_line):
+            next_key = '%s %s' % (out_list[left_frame+1], out_list[left_frame + 2])
+            while not next_key in trigram_dict:
+                next_key = get_randomkey(trigram_dict)
+            next_word = get_newword(next_key, trigram_dict)
+            out_list.append(next_word)
+            left_frame += 1
+        out_list.append('\n')
+    out_list.append('...')
+    out_string = ' '.join(out_list)
+    return out_string
+
+
+if __name__ == '__main__':
+    # num_words gives the number of words to be generated
+    # words_line gives the number of words per line
+    num_words = 200
+    words_line = 20
+    #source_text = '/intropython/data/sherlock_small.txt'
+    source_text = '/intropython/data/sherlock.txt'
+
+    new_inbook = get_book(source_text)
+    new_dict = create_dict(new_inbook)
+    new_outbook = create_newbook(new_dict, num_words, words_line)
+    print new_outbook
\ No newline at end of file
diff --git a/Students/RPerkins/session04/mailroom.py b/Students/RPerkins/session04/mailroom.py
new file mode 100644
index 00000000..9a8e5092
--- /dev/null
+++ b/Students/RPerkins/session04/mailroom.py
@@ -0,0 +1,118 @@
+__author__ = 'Robert W. Perkins'
+
+
+def mk_dbase():
+    """Create data structure for donor list"""
+    # donor name = key: sum of donations, donation 1, donation 2, ...
+    ndbase = {
+        'Jeff McCarthy': [4000, 2500, 1000, 500],
+        'Tabitha Simmons': [2450, 450, 2000],
+        'Angela Cartwright': [5500, 5500],
+        'Billy Murray': [3700, 3450, 250],
+        'Alexa Dalton': [6940, 240, 1200, 5500]
+    }
+    return ndbase
+
+
+def get_input():
+    """Ask user whether to send thank you note or create report and return answer"""
+
+    choices = {
+        '1': 'Enter "1" to Send a Thank-You Note',
+        '2': 'Enter "2" to Create a Report',
+        'q': 'Enter "q" to quit-->'
+    }
+    in_put = None
+    while not in_put in choices:
+        in_put = raw_input('%s, %s, %s' % (choices['1'], choices['2'], choices['q']))
+    return in_put
+
+
+def safe_input():
+    try:
+        new_d = raw_input("Enter donation amount (must be numeric)-->")
+    except EOFError:
+        return None
+    except KeyboardInterrupt:
+        return None
+    return int(new_d)
+
+
+def print_email(p_name, p_donation):
+    """ Print thank you note for donation from p_name """
+    ltr_temp = {'Template1': 'Dear {name}, Thanks so much for your generous donation of ${donation}.  '
+                             'It is greatly appreciated!'
+                }
+
+    print ltr_temp['Template1'].format(name=p_name, donation=p_donation)
+
+
+def app_record(app_name, app_dict):
+    """ Append an existing donor record """
+    app_donation = safe_input()
+    app_dict[app_name].append(app_donation)
+    app_dict[app_name][0] += app_donation
+    print_email(app_name, app_donation)
+
+
+def add_record(add_name, add_dict):
+    """ Add new donor to database """
+    add_donation = safe_input()
+    add_dict[add_name] = [add_donation, add_donation]
+    print_email(add_name, add_donation)
+
+
+def thank_you(donor_dict):
+    """ Find or create a donor, add new donation, and return a thank you note"""
+    name = 'list'
+    while name == 'list':
+        new_name = raw_input("Enter full name of donor-->")
+        name = str(new_name)
+        if not (name == 'list'):
+            break
+        else:
+            for item in donor_dict:
+                print item
+
+    if name in donor_dict:
+        app_record(name, donor_dict)
+    else:
+        add_record(name, donor_dict)
+
+
+def write_efile(name, donation_list):
+    """write a donor email to disk named "name".txt"""
+    to_file = './%s.txt' % name
+    outdata = 'Dear %s, Thanks so much for your recent generous donation of $%s.  ' \
+              'It is greatly appreciated!' % (name, donation_list[-1])
+    open(to_file, 'w').write(outdata)
+
+
+#def sum_element(key_dbase):
+    #"""set key for sorting on sum element of data structure"""
+    #return key_dbase[1]
+
+
+def mk_report(rep_dict):
+    """ Create a sorted list of donors"""
+    print 'Donor Name\t\t\tTotal Donations\t# of Donations\t\tAverage Donation'
+    #rep_dbase.sort(key=sum_element)
+    for j, k in rep_dict.items():
+        num_donations = len(k)-1
+        avg_donation = k[0]/(len(k)-1)
+        print '%s\t\t\t%s\t\t\t\t%s\t\t\t\t\t\t%s' % (j, k[0], num_donations, avg_donation)
+        write_efile(j,k)
+
+
+if __name__ == '__main__':
+    donor = mk_dbase()
+    answer = None
+    while not (answer == "q"):
+        answer = get_input()
+        if answer == "q":
+            break
+        elif answer == "1":
+            thank_you(donor)
+        else:
+            mk_report(donor)
+    print "Exiting"
diff --git a/Students/RPerkins/session04/print_filepath.py b/Students/RPerkins/session04/print_filepath.py
new file mode 100644
index 00000000..22128e94
--- /dev/null
+++ b/Students/RPerkins/session04/print_filepath.py
@@ -0,0 +1,7 @@
+__author__ = 'Robert W. Perkins'
+
+import pathlib
+
+pth = pathlib.Path('./')
+for f in pth.iterdir():
+    print '%s\%s' % (pth.absolute(), f)
diff --git a/Students/RPerkins/session04/test.txt b/Students/RPerkins/session04/test.txt
new file mode 100644
index 00000000..e6d2cb24
--- /dev/null
+++ b/Students/RPerkins/session04/test.txt
@@ -0,0 +1 @@
+This is the test file content
\ No newline at end of file
diff --git a/Students/RPerkins/session04/test/testcopy.txt b/Students/RPerkins/session04/test/testcopy.txt
new file mode 100644
index 00000000..e6d2cb24
--- /dev/null
+++ b/Students/RPerkins/session04/test/testcopy.txt
@@ -0,0 +1 @@
+This is the test file content
\ No newline at end of file