> #include<iostream>
> #include<cstring>
> using  namespace std;
> int judge(string a,string b)
> {
>      int c[500][500];
>      int na=a.length();
>      int nb=b.length();
>      for(int i=0;i<=na;i++) 
>              for(int j=0;j<=nb;j++)  c[i][j]=0;
>      for(int i=1;i<=na;i++)
>      for(int j=1;j<=nb;j++)
>      {
>       if(a[i-1]==b[j-1])   c[i][j]=c[i-1][j-1]+1;
>       else if(c[i-1][j]>c[i][j-1]) c[i][j]=c[i-1][j];
>       else    c[i][j]=c[i][j-1];
>      }
>      cout<<c[na][nb]; 
>     return c[na][nb]; 
> }
> int main()
> {
>     string a,b,c;
>     int n;
>     cin>>n;
>     for(int i=1;i<=n;i++)
>     {
>             cin>>a>>b>>c;
>             if(judge(a,c)+judge(b,c)==c.length())
>                     cout<<"Data set "<<i<<": yes"<<endl;
>             else    cout<<"Data set "<<i<<": no"<<endl;
>             
>     }
>     system("pause");
>     return 0;
> }