import java.util.*;enum M{M;System z;{int i,j;for(Scanner s=new Scanner(z.in);(i=s.nextInt(16))>0;j=s.nextInt(16),z.out.printf(i<j?"%#x = %x\n":"%x = %#x\n",i,j))s.next();}}
Note that non-ascii characters in the above source code will be escaped (such as \x9f).