#include <bits/stdc++.h>
using namespace std;
int t, n, m;
int main() {
ios::sync_with_stdio(0);
cin.tie(0);
cin >> t;
for(int ti = 1; ti <= t; ++ti) {
cin >> n >> m;
if(n == 1) {
cout << m << "\n";
for(int i = 1; i <= m; ++i) {
cout << "-";
}
cout << "\n";
} else if(m == 1) {
cout << n << "\n";
for(int i = 1; i <= n; ++i) {
cout << "+";
cout << "\n";
}
} else {
int ns = (n - 1) / 2 * 2, ms = (m - 1) / 2 * 2;
if(max(n + m / 2, m + n / 2) > ns + ms) {
if(n > m) {
cout << n + m / 2 << "\n";
for(int i = 1; i <= n; ++i) {
for(int j = 1; j <= m; ++j) {
cout << (j <= m / 2 ? "-" : "+");
}
cout << "\n";
}
} else {
cout << m + n / 2 << "\n";
for(int i = 1; i <= n; ++i) {
for(int j = 1; j <= m; ++j) {
cout << (i > n / 2 ? "-" : "+");
}
cout << "\n";
}
}
}
cout << ns + ms << "\n";
for(int i = 1; i <= n; ++i) {
for(int j = 1; j <= m; ++j) {
if(i > ns) {
cout << "-";
} else if(j > ms) {
cout << "+";
} else {
cout << (((i + j) & 1) ? "-" : "+");
}
}
cout << "\n";
}
}
#ifdef WEEE
cout << flush;
#endif
}
cout << flush;
return 0;
}
