constexpr short q2[4][3][2] = { 1, 0, 0, 0, 0, 0, 2, 3, 0, 0, 0, 0, 4, 5, 6 };
static_assert(q2[0][0][0] == 1);
static_assert(q2[1][0][0] == 2);
static_assert(q2[1][0][1] == 3);
static_assert(q2[2][0][0] == 4);
static_assert(q2[2][0][1] == 5);
static_assert(q2[2][1][0] == 6);