//In The Name Of ALLAH!
#pragma GCC optimize("O3")
#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
using namespace __gnu_pbds;
using namespace std;
#define ll long long
#define ld long double
#define endl '\n'
#define pb push_back
#define pf push_front
#define speedyboy ios_base::sync_with_stdio(false); cin.tie(NULL); cout.tie(NULL);
#define bpc __builtin_popcount
#define all(x) x.begin() , x.end()
#define allr(x) x.rbegin() , x.rend()
#define F first
#define S second
#define pll pair<ll , ll>
#define turtle tuple<ll , ll , ll>
#define pss pair<string , string>
#define YES cout << "YES" << endl;
#define NO cout << "NO" << endl;
#define ordered_set tree<ll , null_type , less<ll> , rb_tree_tag , tree_order_statistics_node_update>
const ll sz = 3e3 + 5 , INF = 1e18 , MOD = 998244353;
char a[sz][sz] , b[sz][sz];
ll mask , i , j , o;
void solve(){
ll n , m , ans = 0;
cin >> n >> m;
bool ok = false;
if(n > m){
swap(n , m);
ok = true;
}
for(i = 0 ; i < n ; i++){
for(j = 0 ; j < m ; j++){
a[i][j] = '-';
}
}
vector<ll> cntcol(m + 1 , 0);
for(i = 0 ; i < n ; i++){
vector<pll> v;
for(j = 0 ; j < m ; j++){
if((cntcol[j] + 1) * 2 < n) v.pb({cntcol[j] , j});
}
if(v.size() * 2 <= m) break;
for(j = 0 ; j * 2 <= m ; j++){
a[i][v[j].S] = '+';
cntcol[v[j].S]++;
}
ans++;
}
cout << ans << endl;
if(!ok){
for(i = 0 ; i < n ; i++){
for(j = 0 ; j < m ; j++){
cout << a[i][j];
}
cout << endl;
}
}
else{
for(i = 0 ; i < n ; i++){
for(j = 0 ; j < m ; j++){
b[j][i] = a[i][j];
}
}
swap(n , m);
for(i = 0 ; i < n ; i++){
for(j = 0 ; j < m ; j++){
a[i][j] = b[i][j];
if(a[i][j] == '+') a[i][j] = '-';
else a[i][j] = '+';
}
}
for(i = 0 ; i < n ; i++){
for(j = 0 ; j < m ; j++){
cout << a[i][j];
}
cout << endl;
}
}
}
signed main(){
speedyboy;
//open;
ll t = 1;
cin >> t;
while(t--){
solve();
}
}
