/*#include <stdio.h>
#include <stdlib.h>
int main()
{
printf("Hello world!\n");
return 0;
}
*/
/*#include <stdio.h>
int main ()
{
int a,b;
for(a=1; a<=100; a++){
printf("%d ",a);
}
return 0;
}
*/
/*#include <stdio.h>
int main ()
{
int a,b;
scanf("%d %d",&a,&b);
if(a<b){
for(a; a<=b; a++){
printf("%d ",a);
}
}
else {
for(b; b<=a; b++){
printf("%d ",b);
}
}
return 0;
}
*/
/*#include <stdio.h>
int main ()
{
char c,d;
scanf("%c %c",&c,&d);
for(c; c<=d; c++){
printf("%c ",c);
}
return 0;
}
*/
/*#include <stdio.h>
int main ()
{
double a,b;
scanf("%lf %lf",&a,&b);
for(a; a<=b; a=a+0.01){
printf("%.2lf ",a);
}
return 0;
}
*/
/*#include <stdio.h>
int main ()
{
int b,a;
scanf("%d",&a);
for(b=1; b<=a; b++) {
printf("*");
}
}
*/
#include <stdio.h>
int main ()
{
int a,b;
scanf("%d %d",&a,&b);
for(a=b; a<=b; a++){
if(a%2==0){
printf("%d ",a);
}
}
return 0;
}