bounty_combos.py

import itertools as it

a = ["ais532", "Anders Kaseorg", "Dennis", "DJMcMayhem", "Martin Ender", "udioica", "Primo", "Martin Ender"]
b = ["Martin Ender", "Dennis", "Luis Mendo", "DJMcMayhem", "Nimi", "AdmBorkBork", "Mego", "Nathan Merrill"]

combos = list(list(zip(x, b)) for x in it.permutations(a, len(b)))
print(len(combos))
good_combos = []

for combo in combos:
    if all(pair[0] != pair[1] for pair in combo):
        good_combos.append(combo)

print(len(good_combos))