Pick Your Power Interesting!

you start with
a
b
c
d
e
f

then all the 1s go to the bottom and are arranged in the order of their second number
a
b
d
c
e
f

then the 4 goes to the top, but it already is there, so the order stays the same
so then the 7s go to the bottom, in order of the second number
a
c
e
f
d
b