1 #include<iostream>
2 #include<algorithm>
3 #define MAXN 15
4 using namespace std;
5
6 //int rec[MAXN];
7
8 int main()
9 {
10 //freopen("acm.acm","r",stdin);
11 int ans;
12 int x;
13 int y;
14 int dight_x;
15 int dight_y;
16 int i;
17 int rec;
18 while(cin>>x>>y)
19 {
20 if(!x&&!y)
21 break;
22 ans = 0;
23 i = 0;
24 rec = 0;
25 while(y||x)
26 {
27 dight_x = x%10;
28 dight_y = y%10;
29 x /= 10;
30 y /= 10;
31 if(rec + dight_x + dight_y > 9)
32 {
33 rec = 1;
34 ++ ans;
35 }
36 else
37 rec = 0;
38 }
39 if(ans == 0)
40 cout<<"No carry operation."<<endl;
41 else if(ans > 1)
42 cout<<ans<<" carry operations."<<endl;
43 else
44 cout<<ans<<" carry operation."<<endl;
45 }
46 }
