#include <bits/stdc++.h>
using namespace std;

int main() {
	int t;
	cin >> t;
	while(t--){
		int n;
		cin >> n;
		vector<int>v;
		string s;
		cin >> s;
		for(int i=0; i<s.length(); i++){
			v.push_back(s[i] - '0');
		}
		for(int u:v)cout << u << " ";
		cout << endl;
	}
	return 0;
}