1 #include <iostream>
 2 #include <cstring>
 3 #include <algorithm>
 4 #include <cstdio>
 5 #include <cmath>
 6 using namespace std;
 7 
 8 int main()
 9 {
10     int n,m;
11     while(scanf("%d%d", &n, &m) != EOF)
12     {
13         if(n == 0 && m == 0)
14             break;
15         if(n > m)
16         {
17             swap(n, m);
18         }
19         double gold = (sqrt(5) + 1)/2;
20         int c = gold * (m - n);
21         int a,b;
22         if(c == n)
23         {
24             printf("0\n");
25         }
26         else
27         {
28             printf("1\n");
29             printf("%d %d\n", c, c + m - n);
30             for(int i = 1; i <= m; i++)
31             {
32                a = i * gold;
33                if(a == c)
34                    continue;
35                b = a + i;
36                if(a == n)
37                {
38                    printf("%d %d\n", a,b);
39                }
40                else if(b == n)
41                {
42                    printf("%d %d\n",a, b);
43                }
44                else if(b == m)
45                {
46                    printf("%d %d\n", a, b);
47                }
48             }
49         }
50     }
51     return 0;
52 }