#include <bits/stdc++.h>   using namespace std;   int main() {     ios_base::sync_with_stdio(0);     cin.tie(0);     int t;     cin >> t;     while (t-- > 0) {       int l, r;       cin >> l >> r;       cout << l <<     << 2 * l <<   n ;     }     return 0;   }   