gg
dd
10p
gg
dd
:1,2s/[^0]//g
:2,3s/[^1]//g
:3,4s/[^2]//g
:4,5s/[^3]//g
:5,6s/[^4]//g
:6,7s/[^5]//g
:7,8s/[^6]//g
:8,9s/[^7]//g
:9,10s/[^8]//g
:10,11s/[^9]//g
:%s/\n//g
:wq