#include <cstdio>
#include <cstdlib>
#include <ctime>

int sz[52] = { 0,
3, 7, 8, 9, 12,
123, 125, 299, 313, 500,
777, 999, 1234, 2356, 4499,
5050, 5123, 6432, 6666, 6669,
7878, 7777, 7998, 7789, 8000,
8888, 9123, 9999, 10000, 10000
};

int main()
{
    int st, ed;
    char in[110], out[110];
    scanf("%d%d", &st, &ed);
    srand(time(NULL));
    for(int i = st ; i <= ed ; i++ )
    {
        sprintf(in, ".%d.in", i);
        freopen(in, "w", stdout);
        printf("%d\n", sz[i]);
        for(int j = 0 ; j < sz[i] ; j++ )
            printf("%d", rand()%2);
    }
}