mystery(1, 32) -------------- a = 1 b = 32 myst_rest = mystery(2, 16) = 10 return 1 + 10 = 11 mystery(2, 16) -------------- a = 2 b = 16 myst_rest = mystery(4, 8) = 8 return 2 + 8 = 10 mystery(4, 8) ------------- a = 4 b = 8 myst_rest = mystery(8, 4) = 4 return 4 + 4 = 8 mystery(8, 4) ------------- a = 8 b = 4 return 4