<s>[INST] I have seven bags of different colours containing different numbers of balls. The bags are: empty (E), 2 red balls (R), 2 blue balls (B), 2 green balls (G), 3 red balls (T), 2 red and 1 blue (Y), 1 green and 1 blue (W). Using only the process of picking a ball from a bag, putting it in another bag, and then picking a ball from that bag, describe a sequence of operations that results in a bag that contains 1 red ball and 1 blue ball.[/INST]