# include <bits/stdc++.h>
# define FILE
using namespace std;
int main(){
# ifdef FILEs
freopen( "input.txt", "r", stdin );
freopen( "output.txt", "w", stdout );
# endif
int t;
cin >> t;
while( t -- ){
int n, m;
cin >> n >> m;
char a[n][m];
int ans = 0;
if( n < m ){
ans = m + (n-1)/2;
for( int i = 0; i < n; i ++ )
for( int j = 0; j < m; j ++ )
a[i][j] = '-';
for( int i = 0; i < (n-1)/2; i ++ )
for( int j = 0; j < m; j ++ )
a[i][j] = '+';
}
else{
ans = n + (m-1)/2;
for( int i = 0; i < n; i++ )
for( int j = 0; j < m; j ++ )
a[i][j] = '+';
for( int j = 0; j < (m-1)/2; j ++ )
for( int i = 0; i < n; i ++ )
a[i][j] = '-';
}
cout << ans << endl;
for( int i = 0; i < n; i ++ ){
for( int j = 0; j < m; j ++ ){
cout << a[i][j];
}cout << endl;
}
}
return 0;
}
