#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef pair <int, int> pii;
#define fi first
#define se second
#define pb push_back
const int MOD = 1e9 + 7;
const int MAX = 2e5 + 5;
#define int ll
signed main(){
ios_base::sync_with_stdio(0);
cin.tie(0);
int tc; cin >> tc;
while(tc--){
int n, m; cin >> n >> m;
char a[n][m];
for(int i = 0 ; i < n ; i++){
for(int j = 0 ; j < m ; j++)a[i][j] = '+';
}
bool swit = 0;
if(n < m){
swap(n, m);
swit = 1;
}
vector <int> cnt(n, m);
bool cont = 1;
int r =0, c = 0;
ll ans = n;
while(cont){
int tmp = r;
for(int i = 1 ; i <= n / 2 + 1 ; i++){
cnt[tmp]--;
tmp++;
if(tmp >= n)tmp = 0;
}
tmp = r;
for(int i = 1 ; i <= n / 2 + 1 ; i++){
if(cnt[tmp] <= m / 2)cont = 0;
tmp++;
if(tmp >= n)tmp = 0;
}
if(!cont)break;
ans++;
for(int i = 1 ; i <= n ; i++){
if(swit)a[c][r] = '-';
else a[r][c] = '-';
r++;
if(r >= n)r = 0;
}
c++;
}
cout << ans << endl;
if(swit){
for(int i = 0 ; i < m ; i++){
for(int j = 0 ; j < n ; j++){
cout << (a[i][j] == '-' ? '+' : '-');
}
cout << endl;
}
}
else{
for(int i = 0 ; i < n ; i++){
for(int j = 0 ; j < m ; j++){
cout << a[i][j];
}
cout << endl;
}
}
}
return 0;
}
/*
#include <bits/stdc++.h>
using namespace std;
#define ll long long
#define ld long double
void solve() {
int N, M; cin >> N >> M;
vector<vector<char>> A(N, vector<char>(M, '+'));
bool rot = 0;
if(N < M) {
swap(N, M);
rot = 1;
}
vector<int> cnt(N, M);
bool can = 1;
int r = 0, c = 0, answer = N;
while(can) {
int it = r;
for(int i = 1; i <= N / 2 + 1; ++i) {
cnt[it]--;
it++; if(it >= N)it = 0;
}
it = r;
for(int i = 1; i <= N / 2 + 1; ++i) {
if(cnt[it] <= M / 2) {
can = 0;
}
it++; if(it >= N)it = 0;
}
if(!can) {
break;
}
answer++;
for(int i = 1; i <= N / 2 + 1; ++i) {
if(rot) {
A[c][r] = '-';
}
else {
A[r][c] = '-';
}
r++; if(r >= N)r = 0;
}
c++;
}
cout << answer << "\n";
if(rot) {
for(int i = 0; i < M; ++i) {
for(int j = 0; j < N; ++j) {
cout << (A[i][j] == '+' ? '-' : '+');
}
cout << "\n";
}
return;
}
for(int i = 0; i < N; ++i) {
for(int j = 0; j < M; ++j) {
cout << A[i][j];
}
cout << "\n";
}
}
int main() {
ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);
int tc = 1; cin >> tc;
while(tc--) {
solve();
}
return 0;
}
*/
