a = 1; b = -3; c = -3; ---------- a = 3; b = -1; c = -3; ---------- a = -3; b = 1; c = -3; ---------- a = -1; b = 3; c = -3; ---------- a = 1; b = -2; c = -2; ---------- a = 2; b = -1; c = -2; ---------- a = -2; b = 1; c = -2; ---------- a = -1; b = 2; c = -2; ---------- a = 1; b = -1; c = -1; ---------- a = -1; b = 1; c = -1; ---------- a = 0; b = -3; c = 0; ---------- a = 0; b = -2; c = 0; ---------- a = 0; b = -1; c = 0; ---------- a = -3; b = 0; c = 0; ---------- a = -2; b = 0; c = 0; ---------- a = -1; b = 0; c = 0; ---------- a = 0; b = 0; c = 0; ---------- a = 1; b = 0; c = 0; ---------- a = 2; b = 0; c = 0; ---------- a = 3; b = 0; c = 0; ---------- a = 0; b = 1; c = 0; ---------- a = 0; b = 2; c = 0; ---------- a = 0; b = 3; c = 0; ---------- a = -1; b = -1; c = 1; ---------- a = 1; b = 1; c = 1; ---------- a = -1; b = -2; c = 2; ---------- a = -2; b = -1; c = 2; ---------- a = 2; b = 1; c = 2; ---------- a = 1; b = 2; c = 2; ---------- a = -1; b = -3; c = 3; ---------- a = -3; b = -1; c = 3; ---------- a = 3; b = 1; c = 3; ---------- a = 1; b = 3; c = 3; ---------- ==========