#include <bits/stdc++.h>
//#include "grader.h"
/*#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>*/
#define ll long long
#define ll1 long long
#define ull unsigned long long
#define dou long double
#define str string
#define vll vector<ll>
#define vi vector<int>
#define pll pair<ll, ll>
#define vpll vector<pll>
#define vbool vector<bool>
#define vstr vector<str>
#define vvll vector<vll>
#define pb push_back
#define pf push_front
//#define endl "\n"
#define fr first
#define se second
// #define sortcmp(a) sort(a.begin(), a.end(), cmp)
#define sort(a) sort(a.begin(), a.end())
#define all(a) a.begin(), a.end()
#define reverse(a) reverse(a.begin(), a.end())
#define speed ios_base::sync_with_stdio(0);cin.tie(0);cout.tie(0)
#define INF 1000000000000000000
#define ordered_set tree<pll, null_type, less<pll>, rb_tree_tag, tree_order_statistics_node_update>
using namespace std;
//using namespace __gnu_pbds;
mt19937 rng(1488);
ll randll(ll l, ll r){
return uniform_int_distribution<ll>(l, r)(rng);
}
/*vvll s1;
vll p;
ll find(ll v) {
if (p[v] == v) return v;
return p[v] = find(p[v]);
}
vll unite(ll a, ll b) {
a = find(a);
b = find(b);
if (a == b) return {};
if (s1[a].size() < s1[b].size()) {
p[a] = b;
for (auto i : s1[a]) {
s1[b].pb(i);
}
return s1[a];
}
else {
p[b] = a;
for (auto i : s1[b]) {
s1[a].pb(i);
}
return s1[b];
}
}
vll tree1, d, tree;
void push(ll v, ll tl, ll tr) {
if (tl == tr) return;
tree1[v*2] += d[v];
tree1[v*2+1] += d[v];
d[v*2] += d[v];
d[v*2+1] += d[v];
d[v] = 0;
tree1[v] = tree1[v*2]+tree1[v*2+1];
}
void bt(ll v, ll tl, ll tr, vll& a) {
if (tl == tr) {
tree1[v] = tree[v] = a[tl];
return;
}
ll tm = (tl+tr)/2;
bt(v*2, tl, tm, a);
bt(v*2+1, tm+1, tr, a);
tree1[v] = min(tree1[v*2], tree1[v*2+1]);
tree[v] = max(tree[v*2], tree[v*2+1]);
}
ll get(ll l, ll r, ll v, ll tl, ll tr) {
if (l <= tl && tr <= r) return tree[v];
if (tl > r || tr < l) return -INF;
ll tm = (tl+tr)/2;
//push(v, tl, tr);
ll p = get(l, r, v*2, tl, tm), p1 = get(l, r, v*2+1, tm+1, tr);
return max(p,p1);
}
void update(ll idx, ll val, ll v, ll tl, ll tr) {
if (tl == tr) {
tree[v] = val;
/*d[v] += val;
push(v, tl, tr);
return;
}
ll tm = (tl+tr)/2;
//push(v, tl, tr);
if (idx <= tm)update(idx, val, v*2, tl, tm);
else update(idx, val, v*2+1, tm+1, tr);
tree[v] = max(tree[v*2], tree[v*2+1]);
}*/
int main() {
srand(time(0));
speed;
ll t;
cin >> t;
while (t --) {
ll n, m;
cin >> n >> m;
ll res = max(n, m)+min(n, m)-min(n,m)/2-1;
if (n < m) {
vstr s(n, "");
for (int i = 0; i < n/2+1; i ++) {
for (int j = 0; j < m; j ++) {
s[i] += "-";
}
}
for (int i = n/2+1; i < n; i ++) {
for (int j = 0; j < m; j ++) {
s[i] += "+";
}
}
ll k = n/2;
for (int i = n/2+1; i < n-1; i += 2) {
for (int j = 0; j < m/2-(m%2 == 0); j ++) {
swap(s[i][j], s[k][j]);
}
if (m % 2 == 0) swap(s[i+1][m/2-1], s[k][m/2-1]);
swap(s[i+1][m/2], s[k][m/2]);
k --;
res ++;
}
cout << res << endl;
for (int i = 0; i < n; i ++) {
cout << s[i] << endl;
}
}
else {
vstr s(n, "");
for (int i = 0; i < m/2+1; i ++) {
for (int j = 0; j < n; j ++) {
s[j] += "+";
}
//cout << endl;
}
for (int i = m/2+1; i < m; i ++) {
for (int j = 0; j < n; j ++) {
s[j] += "-";
}
}
ll k = m/2;
for (int i = m/2+1; i < m-1; i += 2) {
for (int j = 0; j < n/2-(n % 2 == 0); j ++) {
swap(s[j][i], s[j][k]);
}
if (n % 2 == 0) swap(s[n/2-1][i+1], s[n/2-1][k]);
swap(s[n/2][i+1], s[n/2][k]);
k --;
res ++;
}
cout << res << endl;
for (int i =0 ; i < n; i ++) {
cout << s[i] << endl;
}
}
}
}
