[/] a==a(directory)
[/a] l1==l1(directory)
[/a] missing<-l2(directory)
[/a/l2] missing<-l3(directory)
[/a/l2] missing<-l4(directory)
[/] b==b(directory)
[/b] l2->missing(directory)
[/b/l2] l1->missing(directory)
[/b] missing<-l3(directory)
[/b] missing<-l4(directory)
[/b/l4] missing<-l1(directory)
[/b/l4] missing<-l2(directory)
Entries are different
total: 12, equal: 3, distinct: 0, only left: 2, only right: 7