#include <iostream>
int main() {
int nrt, sizx, sizy;
int sizx1, sizx2, sizy1, sizy2;
int ans;
int pos;
std::cin >> nrt;
while (nrt--) {
std::cin >> sizx >> sizy;
if (sizx <= sizy && sizx < 3) {
std::cout << sizy << '\n';
for (int index = 0; index < sizx; index++) {
for (int index2 = 0; index2 < sizy; index2++) {
std::cout << '-';
}
std::cout << '\n';
}
}
else if (sizy < 3) {
std::cout << sizx << '\n';
for (int index = 0; index < sizx; index++) {
for (int index2 = 0; index2 < sizy; index2++) {
std::cout << '+';
}
std::cout << '\n';
}
}
else {
sizx1 = (sizx - 1) >> 1;
sizx2 = (sizx >> 1) + 1;
sizy1 = (sizy - 1) >> 1;
sizy2 = (sizy >> 1) + 1;
ans = sizx + sizy + sizx1 + sizy1 - sizx2 - sizy2;
if (ans < sizy + (((sizx - 1) >> 1) * sizy) / ((sizy >> 1) + 1)) {
std::cout << sizy + (((sizx - 1) >> 1) * sizy) / ((sizy >> 1) + 1) << '\n';
pos = 0;
for (int index = 0; index < (((sizx - 1) >> 1) * sizy) / ((sizy >> 1) + 1); index++) {
if (pos + (sizy >> 1) + 1 > sizy) {
for (int index2 = 0; index2 < pos + (sizy >> 1) + 1 - sizy; index2++) {
std::cout << '+';
}
for (int index2 = pos + (sizy >> 1) + 1 - sizy; index2 < pos; index2++) {
std::cout << '-';
}
for (int index2 = pos; index2 < sizy; index2++) {
std::cout << '+';
}
pos += (sizy >> 1) + 1 - sizy;
}
else {
for (int index2 = 0; index2 < pos; index2++) {
std::cout << '-';
}
for (int index2 = pos; index2 < pos + (sizy >> 1) + 1; index2++) {
std::cout << '+';
}
for (int index2 = pos + (sizy >> 1) + 1; index2 < sizy; index2++) {
std::cout << '-';
}
pos += (sizy >> 1) + 1;
}
std::cout << '\n';
}
for (int index = (((sizx - 1) >> 1) * sizy) / ((sizy >> 1) + 1); index < sizx; index++) {
for (int index2 = 0; index2 < sizy; index2++) {
std::cout << '-';
}
std::cout << '\n';
}
}
else if (ans < sizx + (((sizy - 1) >> 1) * sizx) / ((sizx >> 1) + 1)) {
std::cout << sizx + (((sizy - 1) >> 1) * sizx) / ((sizx >> 1) + 1) << '\n';
for (int index = 0; index < sizx; index++) {
pos = 0;
for (int index2 = 0; index2 < (((sizy - 1) >> 1) * sizx) / ((sizx >> 1) + 1); index2++) {
if (pos + (sizx >> 1) + 1 > sizx) {
if (pos + (sizx >> 1) + 1 - sizx <= index && index < pos) {
std::cout << '+';
}
else {
std::cout << '-';
}
pos += (sizx >> 1) + 1 - sizx;
}
else {
if (pos <= index && index < pos + (sizx >> 1) + 1) {
std::cout << '-';
}
else {
std::cout << '+';
}
pos += (sizx >> 1) + 1;
}
}
for (int index2 = (((sizy - 1) >> 1) * sizx) / ((sizx >> 1) + 1); index2 < sizy; index2++) {
std::cout << '+';
}
std::cout << '\n';
}
}
else {
std::cout << ans << '\n';
for (int index = 0; index < sizx1; index++) {
for (int index2 = 0; index2 < sizy1; index2++) {
std::cout << '-';
}
for (int index2 = sizy1; index2 < sizy; index2++) {
std::cout << '+';
}
std::cout << '\n';
}
for (int index = sizx1; index < sizx2; index++) {
for (int index2 = 0; index2 < sizy; index2++) {
std::cout << '-';
}
std::cout << '\n';
}
for (int index = sizx2; index < sizx; index++) {
for (int index2 = 0; index2 < sizy2; index2++) {
std::cout << '+';
}
for (int index2 = sizy2; index2 < sizy; index2++) {
std::cout << '-';
}
std::cout << '\n';
}
}
}
}
return 0;
}
