#include <iostream>
using namespace std;
int main() {
int t;
while(t--)
{
int n1,n2,x,s,y=0,r;
cin>>n1>>n2;
cout<<n1<<n2;
for(int i=n1;i<=n2;i++)
{
s=i;
r=0;
x=0;
r=0;
cout<<i;
while(s!=0)
{
r=s%10;
x=x*10+r;
s=s/10;
cout<<r;
}
if(x==i)
{
y+=i;
cout<<y;
}
}
cout<<y<<endl;
}
return 0;
}
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