1

#include <stdio.h>
int main()
{
    int start; //m
    int end; //n
    scanf("%d%d",&start,&end);

    int i;
    int temp;
    int flag=0, c, min = 9999;

    for(i=start;i<=end;i++)
    {flag=0;
        temp=i;
        while(temp>0)
        {
            c = temp % 10;
            if (c == 0) { //9!= || T
                flag = 0;
            }
            if( c % 2 != 0)
            {
                flag = 1;
            }
            temp /= 10;
        }
        if (flag == 0) {
            if (i < min) {
               min = i;
            }
        }

    }
    if (min != 9999)
        printf("%d", min);
    else
        printf("NE");

    return 0;
}