Roulette strategy - Belle’s Repeating Number

This system of game in a roulette has won summer competition of strategy on site Gamblers Glen. So:

• The maximal duration of session - 37 spins.
• We put on all those numbers which 2 times have dropped out even.
• We finish session when have won and it is begun new.
• We finish session if have lost more than 50 units.

That is, we do zero spins while one of numbers will not drop out twice. We start to put on it if still any numbers drop out two times, we put and on them too. We stop the given session if have won, have reached 37 spins or have lost more than 50 units.