#include <iostream>
#include <algorithm> // for sort, mainly
#include <vector>
#include <map>
#include <set>
#include <cmath>
#include <array>
#include <string>
#include <cstdio>
#include <iterator>
#include <unordered_set>
#include <cstdint> // for int64_t, int32_t, etc
#include <queue>
#include <stack>
#include <deque>
#include <numeric> // gcd, lcm
#include <fstream>
#include <bitset> // for bitset
#include <iomanip>
#include <cassert> // for set with custom ordering
#include <type_traits> // for set with custom ordering
#include <utility> // for swap, forward, etc
using namespace std;

#pragma GCC optimize("O2")
// #pragma GCC optimize("O1","O2","O3","Ofast","unroll-loops")
// #pragma GCC target("sse","sse2","sse3","sse4.1","sse4.2","avx","avx2","fma")

template<typename A, typename B> ostream& operator<<(ostream &os, const pair<A, B> &p) { return os << '(' << p.first << ", " << p.second << ')'; }
template<typename T_container, typename T = typename enable_if<!is_same<T_container, string>::value, typename T_container::value_type>::type> ostream& operator<<(ostream &os, const T_container &v) { os << '{'; string sep; for (const T &x : v) os << sep << x, sep = ", "; return os << '}'; }
void dbg_out() { cout << endl; }
template<typename Head, typename... Tail> void dbg_out(Head H, Tail... T) { cout << ' ' << H; dbg_out(T...); }
#ifdef LOCAL
#define dbg(...) cout << "(" << #__VA_ARGS__ << "):", dbg_out(__VA_ARGS__)
#else
#define dbg(...)
#endif

/*

notes:

int64_t
stoi(string s) -> string to int
to_string() -> int (or else) to string

vector declaration:
vector<ll> v(n, 0)
vector<vector<ll>> v(n, vector<ll>(n, 0));

{if statement} ? {truth value} : {false value}

#ifdef LOCAL
    freopen("in.txt","r",stdin);
    freopen("out.txt","w",stdout);
#endif

std::lcm(ll a, ll b), std::gcd(int a, int b)

cout << fixed << setprecision(n);

set with custom ordering
set<ll, decltype(&cmp)> qu(cmp);

*/

typedef int64_t ll;

void solve() {

    ll a, b;
    cin >> a >> b;

    if(b >= a) {
        cout << "-1 -1\n";
        return;
    }

    vector<ll> v; // a score
    vector<ll> vb; // b score
    
    if(a < 33) {
        cout << "-1 -1";
        return;
        // a needs to win at least 3 matches
    }

    while(a > 0) {
        if(a > 11) {
            v.push_back(11);
            a -= 11;
        }else{
            v.push_back(a);
            a = 0;
        }
    }

    ll len = v.size();
    vb.resize(len, 0);
    for(ll i = len - 1; i >= 0; i--) {
        if(v[i] == 11) {
            if(b > 10) {
                vb[i] = 10;
                b -= 10;
            }else{
                vb[i] = b;
                b = 0;
            }
        }else{
            vb[i] = 11;
            b -= 11;
        }

        if(b == 0) {
            break;
        }
    }

    if(b != 0) {
        cout << "-1 -1\n";
        return;
    }

    for(ll i = 0; i < len; i++) {
        cout << v[i] << " " << vb[i] << "\n";
    }

}

int main()
{
	std::ios_base::sync_with_stdio(false);
	//cin.tie(nullptr);
	//cout.tie(nullptr);

	ll tests = 0;
	cin >> tests;
 
	while(tests--)
	{
		solve();
	}

	return 0;
}