Flew on the SIN route recently in NF and there's an extra crew rest area where 3K/4K used to be, and only three rows of two in the centre. So a total now of 12 seats. So there are four "A" seats, three each Es and Fs, and only two Ks.
Senior FO told me all the 777s on the kangeroo run are configured that way.
Yup the Kangaroo-run 777's always used to have 13 seats, rather than 14. And now it's 12 instead of 13. But I don't get your comment about "only three rows of two in the centre". That's all they have ever had, on every 777 with OF, isn't it?