#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;
for(int i=1; i<=n; i++)
for(int j=1; j<=m; j++) ans[i][j] = b[i][j] = 0;
if(n > m) sw = 1, swap(n, m);
else sw = 0;
if(n==3){
for(int i=1; i<=m; i++) ans[3][i] = 1;
}
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';
}
for(int i=1; i<=n; i++)
for(int j=1; j<=m; j++) ans[i][j] = b[i][j] = 0;
}
}
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