There are 81 possible sequences of four notes played on the first three open strings.
Below is a PDF of these 81 sequences, arranged in a random order. You can use it as a basis for devising exercises which include the thumb. For example, (assuming Baroque lute) alternating the thumb between the fourth course and the tenth course. Let me know if you'd like modifications. Possibilities include putting the letters above the ledger lines instead of on them, and shifting the margins to accomodate three-ring punch holes. The URL is https://classwk.pw/auxDocs/lute_all_combos_4_notes_3_strings.pdf -- HW To get on or off this list see list information at http://www.cs.dartmouth.edu/~wbc/lute-admin/index.html
