Combinations and Permutations

[s2t2]

from itertools import combinations 

vals = ["M", "C", "P", "Z"]
combos = combinations(vals, 2) # choose 2
list(combos) #> [('M', 'C'), ('M', 'P'), ('M', 'Z'), ('C', 'P'), ('C', 'Z'), ('P', 'Z')]

h/t: https://www.geeksforgeeks.org/permutation-and-combination-in-python/