#include <bits/stdc++.h>

using namespace std;
const int N = 110;
int a[N], al;

void check(int n,int m){
    al = 0;
    while(n){
        int x = n % m;
        a[++al] = x;
        n /= m;
    }
    for (int i = al; i >= 1; i--){
        printf("%d", a[i]);
    }
    puts("");
}
int main() {
    int n;
    cin >> n;
    int a, b;
    for (int i = 1; i <= n;i++){
        cin >> a >> b;
        check(a, b);
    }
    return 0;
}