#include <bits/stdc++.h>
#pragma GCC optimize("O3")
#define int long long
#define ll long long
#define se second
#define fi first
#define pb push_back
#define lf (id<<1)
#define rg ((id<<1)|1)
#define md ((l+r)>>1)
using namespace std;
typedef pair<int,int> pii;
typedef pair<pii,pii> ipii;
const int MAXN = 2e5+10;
const int SQRT = 450;
const int INF = 2e9;
const int MOD = 998244353;
const int LOG = 20;
int sum(int a, int b){ return (a+MOD+b)%MOD; }
void chsum(int &a, int b){ a = (a+MOD+b)%MOD; }
int mul(int a, int b){ return (a*b)%MOD; }
void chmul(int &a, int b){ a = (a*b)%MOD; }
void chmn(auto &a, auto b){ a = min(a, b); }
void chmx(auto &a, auto b){ a = max(a, b); }
int n, m;
bool sw;
bool ans[1010][1010], b[1010][1010]; // 0 blue col -, 1 red row +
signed main(){
// ios_base::sync_with_stdio(0);cin.tie(0);cout.tie(0);
int T; cin>>T;
while(T--){
cin>>n>>m;
if(n > m) sw = 1, swap(n, m);
else sw = 0;
for(int i=1; i<=n; i++)
for(int j=1; j<=m; j++) ans[i][j] = b[i][j] = 0;
int p = n/2, q = m/2+1, idx = -1, mx = -1;
if(n%2==0) p--;
for(int x=0; x<=m; x++){
int row = n;
if(q-m+x > 0) row = min(n, p*x/(q-m+x) );
if(mx <= x + row){
mx = x+row; idx = x;
}
// cout << x << ' ' << x+row << " x\n";
}
assert(idx == m);
// cout << idx << " mx\n";
if(mx > m){
for(int i=1; i<=n; i++) // jadiin + semua, buat row
for(int j=idx+1; j<=m; j++) ans[i][j] = 1;
if(q-m+idx > 0){ // gk lgsng menang
// idx awal - yg menang col
int take = q-m+idx;
// cout << take << " take\n";
priority_queue <pii> pq; // per column jatah segini
for(int i=1; i<=idx; i++) pq.push({p, i});
for(int i=1; i<=n; i++){ // build row
// ambil take
vector<pii> vec;
for(int t=1; t<=take; t++){
if(pq.empty()) break;
auto [tp, id] = pq.top(); pq.pop();
ans[i][id] = 1;
if(tp-1 > 0)
vec.pb({tp-1, id});
}
for(auto in : vec)
pq.push(in);
}
}
}
if(sw){
for(int i=1; i<=n; i++)
for(int j=1; j<=m; j++)
b[j][i] = 1-ans[i][j];
for(int i=1; i<=m; i++)
for(int j=1; j<=n; j++)
ans[i][j] = b[i][j];
swap(n, m);
}
int all = 0;
for(int i=1; i<=n; i++){
int tot = 0;
for(int j=1; j<=m; j++){
if(ans[i][j]) tot++;
}
if(tot > m/2) all++;
}
for(int j=1; j<=m; j++){
int tot = 0;
for(int i=1; i<=n; i++){
if(ans[i][j]==0) tot++;
}
if(tot > n/2) all++;
}
cout << all << '\n';
for(int i=1; i<=n; i++){
for(int j=1; j<=m; j++){
cout << (ans[i][j] ? '+' : '-');
}
cout << '\n';
}
cout << '\n';
}
}
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