user=> (bit-flip 2r1011 2) 15 ;; 15 = 2r1111 (bit-flip 2r1111 2) 11 ;; 11 = 2r1011
jafingerhut
on Wed, 28 Mar 2012
user=> (bit-flip 2r1011 2) 15 ;; 15 = 2r1111 (bit-flip 2r1111 2) 11 ;; 11 = 2r1011
zmila
on Wed, 28 Jul 2010
user=> (bit-flip 2r1011 2) 15 ;; 15 = 2r1111 (bit-flip 2r1111 2) 11 ;; 11 = 2r1011