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