What sequence kills white?

[terraform]

I came across this situation recently while watching a game of a 13k vs 13k. When I did my counting practice I didn't count the left white group (sorry, don't know how to mark stones) as dead, but when the 13ks did the counting, they counted it did. I can't see the sequence that kills white. Does anyone see the solution? I only included as much as I thought was necessary.

$$ Black to kill
$$|....X.X
$$|...XOXX
$$|XXXXOX.
$$|OOOXOXX
$$|O.OOOXO
$$|.OOXXX.
$$|XOOXOXX
$$|.XOOOXO
$$|XXXOXXO
$$|XXXXOOO
$$|X..XOXO
$$|OXXXXXO
$$|OOXOOOO
$$|XOOOXOX

Click Here To Show Diagram Code

[go]$$ Black to kill
$$|....X.X
$$|...XOXX
$$|XXXXOX.
$$|OOOXOXX
$$|O.OOOXO
$$|.OOXXX.
$$|XOOXOXX
$$|.XOOOXO
$$|XXXOXXO
$$|XXXXOOO
$$|X..XOXO
$$|OXXXXXO
$$|OOXOOOO
$$|XOOOXOX[/go]

[daniel_the_smith]

Assuming external stones are alive, then you are correct, white is alive (in seki). If black fills the ko, white plays in black's eye to maintain the seki.