#include <cstdio>
using namespace std;
int f(int c)
{
    
    if(c % 400 == 0 || (c % 4 == 0 && c % 100 != 0)) return 1;
    return 0;
}
int main()
{
    int n,m;
    scanf("%d %d",&n,&m);
    for(int i=n+1;i<=m-1;i++)
    {
        if(f(i)) printf("%d\n",i);
    }
}