diff --git a/144/rot13.py b/144/rot13.py
new file mode 100755
index 0000000..0c091cf
--- /dev/null
+++ b/144/rot13.py
@@ -0,0 +1,26 @@
+#!/usr/bin/env python3
+
+import sys
+import string
+
+rawInput = sys.stdin.read()
+output = ""
+
+for c in rawInput:
+    if c in string.ascii_lowercase:
+        letters = string.ascii_lowercase
+    elif c in string.ascii_uppercase:
+        letters = string.ascii_uppercase
+    else:
+        output += c
+        continue
+
+    i = letters.index(c)
+    if i > 12:
+        i -= 13
+    else:
+        i += 13
+
+    output += letters[i]
+
+print(output)
diff --git a/156/decode.py b/156/decode.py
new file mode 120000
index 0000000..5cd9215
--- /dev/null
+++ b/156/decode.py
@@ -0,0 +1 @@
+../22/decode.py
\ No newline at end of file
diff --git a/166/a.txt b/166/a.txt
new file mode 100644
index 0000000..94bac77
--- /dev/null
+++ b/166/a.txt
@@ -0,0 +1 @@
+gAAAAABgUAIWIvSiR0W23DAHIK5DX6Y4BvwES94M_XdDcNAquhp-A0D2z8n812YEXaSD9WhoweBh2cm5Wa0cqzuW0Kc7fOct0OJnpOmVF8A91j0Hx4dKtvk3l5ghPT71Y7GxErPRyJUs
diff --git a/166/ende.py b/166/ende.py
new file mode 100755
index 0000000..e7b5b30
--- /dev/null
+++ b/166/ende.py
@@ -0,0 +1,61 @@
+#!/usr/bin/env python3
+
+import sys
+import base64
+from cryptography.fernet import Fernet
+
+
+
+usage_msg = "Usage: "+ sys.argv[0] +" (-e/-d) [file]"
+help_msg = usage_msg + "\n" +\
+        "Examples:\n" +\
+        "  To decrypt a file named 'pole.txt', do: " +\
+        "'$ python "+ sys.argv[0] +" -d pole.txt'\n"
+
+
+
+if len(sys.argv) < 2 or len(sys.argv) > 4:
+    print(usage_msg)
+    sys.exit(1)
+
+
+
+if sys.argv[1] == "-e":
+    if len(sys.argv) < 4:
+        sim_sala_bim = input("Please enter the password:")
+    else:
+        sim_sala_bim = sys.argv[3]
+
+    ssb_b64 = base64.b64encode(sim_sala_bim.encode())
+    c = Fernet(ssb_b64)
+
+    with open(sys.argv[2], "rb") as f:
+        data = f.read()
+        data_c = c.encrypt(data)
+        sys.stdout.write(data_c.decode())
+
+
+elif sys.argv[1] == "-d":
+    if len(sys.argv) < 4:
+        sim_sala_bim = input("Please enter the password:")
+    else:
+        sim_sala_bim = sys.argv[3]
+
+    ssb_b64 = base64.b64encode(sim_sala_bim.encode())
+    c = Fernet(ssb_b64)
+
+    with open(sys.argv[2], "r") as f:
+        data = f.read()
+        data_c = c.decrypt(data.encode())
+        sys.stdout.buffer.write(data_c)
+
+
+elif sys.argv[1] == "-h" or sys.argv[1] == "--help":
+    print(help_msg)
+    sys.exit(1)
+
+
+else:
+    print("Unrecognized first argument: "+ sys.argv[1])
+    print("Please use '-e', '-d', or '-h'.")
+
diff --git a/186/cat.jpg b/186/cat.jpg
new file mode 100644
index 0000000..7351fbc
Binary files /dev/null and b/186/cat.jpg differ
diff --git a/22/decode.py b/22/decode.py
new file mode 100755
index 0000000..b1c5837
--- /dev/null
+++ b/22/decode.py
@@ -0,0 +1,25 @@
+#!/usr/bin/env python3
+
+import sys
+
+rawInput = sys.stdin.readlines()
+splitInput = [l.strip() for l in rawInput]
+
+for c in splitInput:
+    try:
+        int(c)
+        is_int = True
+    except ValueError:
+        is_int = False
+    assert is_int, "Input must be in decimal form, and separated by newlines"
+
+rawOutput = []
+for c in splitInput:
+    c2 = chr(int(c))
+    rawOutput.append(c2)
+
+output = ""
+for c in rawOutput:
+    output += c
+
+print(output)