|_ sqrt sqrt sqrt sqrt sqrt sqrt sqrt sqrt sqrt 
|_ sqrt sqrt sqrt sqrt sqrt sqrt sqrt sqrt sqrt
|_ sqrt sqrt sqrt sqrt sqrt sqrt sqrt sqrt sqrt sqrt sqrt sqrt sqrt
|_ sqrt sqrt sqrt sqrt sqrt sqrt sqrt sqrt 
|_ sqrt sqrt sqrt sqrt sqrt sqrt sqrt sqrt sqrt sqrt sqrt
|_ sqrt |_ sqrt |_ sqrt sqrt sqrt sqrt sqrt 
(4!)! _| ! _| ! _| ! _| ! _| ! _| ! _| ! _|