6. Once Jay, Mira and Om went for trekking. Every one of them saw a bird that other two did not see and each pair saw one bird that the third did not. There was one bird which was seen by all three of them. Of the birds Jay saw, two were blue. Of the birds Mira saw, three were blue. Of the birds Om saw, four were blue. How many blue and non-blue birds were seen in all? Your answer