import java.math.*;enum c{c;System s;int i,l;BigInteger g;{for(String f,p=new java.util.Scanner(s.in).next();i<++l;)if(new BigInteger(f=p.substring(i,l)).mod(g.valueOf(7))==g.ZERO){s.out.println(f);i=l;}}}
Note that non-ascii characters in the above source code will be escaped (such as \x9f).