#include<bits/stdc++.h>
using namespace std;
#define ll long long
char arr[1005][1005];
void fun(){
bool boo = 0;
ll n, m;
cin>>n>>m;
if(n > m)swap(n, m), boo = 1;
for(int i = 1; i <= n; i++)
for(int j = 1; j <= m; j++)
arr[i][j] = (boo ? '+' : '-');
cout<<max(n, m) + min(min(n, m), (min(n, m) / 2 - !(min(n, m) & 1)) * max(n, m) / (max(n, m) / 2 + 1))<<endl;
for(int i = 1, last = 1; i <= min(min(n, m), (min(n, m) / 2 - !(min(n, m) & 1)) * max(n, m) / (max(n, m) / 2 + 1)); i++){
for(int j = 1; j <= m / 2 + 1; j++, last++){
if(last == m + 1)last = 1;
arr[i][last] = (boo ? '-' : '+');
}
}
if(!boo){
for(int i = 1; i <= n; i++){
for(int j = 1; j <= m; j++)
cout<<arr[i][j];
cout<<"\n";
}
}
else{
for(int i = 1; i <= m; i++){
for(int j = 1; j <= n; j++)
cout<<arr[i][j];
cout<<"\n";
}
}
cout<<"\n";
}
int main(){
int ttt = 1;
cin>>ttt;
while(ttt--)fun();
}
