#include <iostream>
#include <string>
#include <cstring>
#define int long long

int t, k;
std::string x;

void Read (int &i) {
    std::cin >> i;
}

signed main () {
    Read (t);
    
    while (t--) {
        std::cin >> x;
        Read (k);
        
        for (int i = 1; i <= k; i++) std::cout << 9;
        for (int i = 1; i < x.length(); i++) std::cout << 0;
        
        std::cout << std::endl;
    }
    
    return 0;
}

有帮助会非常感谢QaQ