The order in which you found the routes is not important.

 

• a -> 1 -> 2 -> 5 -> 8 -> b
• a -> 1 -> 4 -> 5 -> 8 -> b
• a -> 3 -> 4 -> 5 -> 8 -> b
• a -> 3 -> 7 -> b
• a -> 3 -> 7 -> 8 -> b
• a -> 6 -> 7 -> b
• a -> 6 -> 7 -> 8 -> b
• a -> 6 -> 9 -> b