https://gadikannadiga.com/randomization-of-the-micro-observer-scheme%e0%b2%ae%e0%b3%88%e0%b2%95%e0%b3%8d%e0%b2%b0%e0%b3%8b-%e0%b2%b5%e0%b3%80%e0%b2%95%e0%b3%8d%e0%b2%b7%e0%b2%95%e0%b2%b0-%e0%b2%af%e0%b3%8b%e0%b2%9c%e0%b2%a8/