a=range(65,91) n=0 s=[a[:]] exec"a[:n]+=a.pop(~n-(n==1)),;s+=a[:],\nif~-n:a[n],a[~n]=a[~n],a[n];s+=[a[:]]*(n!=8)\nn+=1;"*12 for l in s+s[-2::-1]:print bytearray(l)
Note that non-ascii characters in the above source code will be escaped (such as \x9f).