Art of framing mystical diagrams, of addressing spells and charms, and binding armlets.
49.

Mental exercises, such as completing stanzas or verses on receiving a part of them; or supplying one, two or three lines when the remaining lines are given indiscriminately from different verses, so as to make the whole an entire verse with regard to its meaning; or arranging the words of a verse written irregularly by separating the vowels from the consonants, or leaving them out altogether; or putting into verse or prose sentences represented by signs or symbols.

There are many other such exercises.
50.

Composing poems.
51.

Knowledge of dictionaries and vocabularies.
52.