1 #include<cstdio>
 2 #include<cstring>
 3 using namespace std;
 4 
 5 int main()
 6 {
 7     //freopen("in.txt","r",stdin);
 8     char s[105];
 9     int a[1005],b[1005];
10     int t,j,i;
11     scanf("%d",&t);
12     while(t--)
13     {
14         memset(a,0,sizeof(a));
15         while(scanf("%s",s)&&strcmp(s,"0")!=0)
16         {
17             memset(b,0,sizeof(b));
18             int len=strlen(s);
19             for(j=0,i=len-1;i>=0;i--)
20             b[j++]=s[i]-‘0‘;
21             for(i=0;i<1005;i++)
22             {
23                 a[i]+=b[i];
24                 if(a[i]>=10)
25                 {
26                     a[i]-=10;
27                     a[i+1]+=1;
28                 }
29             }
30         }
31         for(i=1004;i>=0;i--)
32         if(a[i])break;
33         if(i==-1)
34         printf("0");
35         for(;i>=0;i--)
36         printf("%d",a[i]);
37         printf("\n");
38         if(t!=0)
39         printf("\n");
40     }
41     return 0;
42 }