implement spn algebra template

docs/spn_algebra_template.md

@@ -1,16 +1,18 @@
 # Permutation Algebra
-This notebook is a prerequisite to following the DARC tutorial
+This notebook is a prerequisite to the [DARC](darc.md) tutorial
 
 
 
 ## Key Generation Parameters
-- block size: The number of characters we encode in a block. Block size isn't using in this notebook
-- key height: The alphabet length. If we want to encode bytes, our alphabet length is 256.
-  If we want to encode lowercase letters a-z our alphabet length is 26. NKodes {{ height }} key {{ width }} attribute alphabet is {{ total_attr }}.
-- key width: The number of bytes an encrypted charter is in our alphabet.
+- key height: The alphabet length. To encode bytes, our alphabet length is 256.
+  To encode lowercase letters a-z our alphabet length is 26. To encode a {{ height }} key {{ width }} attribute nKode interface, our alphabet is `{{ height }} x {{ width }} = {{ total_attr }}`.
 
+- key width: The number of bytes an encrypted character is in our alphabet.
+
+
+In this document, we will use the following parameters:
 ```
-height = {{ height }}
+height = {{ height }} 
 width = {{ width }} 
 ```