User blog comment:Mush9/MUSH/@comment-27516045-20161008171408/@comment-30118230-20161012203700

YU(1)=A number that you can never reach with your system unless you use your number+1 many steps!

YU(2)=A number that you can never reach with your system unless you use your YU(1)+1 many steps!

YU(n)=A number that you can never reach with your system unless you use your YU(n-1)+1 many steps!

YU(YU(YU(...(YU(n)....),where ...=YU(n) is equal to YU2(n)

YU2(YU2(YU2(...(YU2(n)....),where ...=YU2(n) is equal to YU3(n)

YU*2(n)=YU+(YU(n))(n)

YU^2(n)=YU*(YU(n))(n)

YU^^.....^^^^^^YU(n),where ...=YU(n) is equal to YUU

Next step:Repeat

YUUUUUUUUUUUUUU......UUU(n),where ...=YUU(n) is equal to YY1(n)

GOOGOLSALAD=YY1(10^100)