#include<stdio.h>
int main()
{
    int i;
    int m,n;
    scanf("%d%d",&m,&n);
    for(i=m;i<=n;i++)
    {
        if(i<1000)
        {
            if((i/100+i%10)==2*(i/10%10))
        {
            printf("%d\n",i);
        }
        }
            if(i>=1000)
            {
                if((i/1000-i/100%10)==(i/100%10-i/10%10)&&(i/100%10-i/10%10)==(i/10%10-i%10))
                {
                    printf("%d\n",i);
                }
            }
        
    }
    return 0;
}

/**************************************************************
	Problem: 1466
	User: admin
	Language: C
	Result: Accepted
	Time:22 ms
	Memory:1144 kb
****************************************************************/