#include "bits/stdc++.h"
#define mxN 1003
using namespace std;
char gr[mxN][mxN];
int main(){
int T;
cin >> T;
while (T --){
int N, M;
cin >> N >> M;
for (int i = 1; i <= N; i ++)
for (int j = 1; j <= M; j ++)
gr[i][j] = "-+"[N >= M];
if (N >= M){
for (int i = 1; i <= N / 2 + 1; i ++)
for (int j = 1; j <= (M + 1) / 2 - 1; j ++)
gr[i][j] = '-';
cout << N + (M + 1) / 2 - 1 << endl;
} else {
for (int i = 1; i <= (N + 1) / 2 - 1; i ++)
for (int j = 1; j <= M / 2 + 1; j ++)
gr[i][j] = '+';
cout << M + (N + 1) / 2 - 1 << endl;
}
for (int i = 1; i <= N; i ++){
for (int j = 1; j <= M; j ++)
cout << gr[i][j];
cout << endl;
}
}
}
