begin
before A
before B
before D
before X
before F
after F
before D
before E
before F
after F
after E
before X
before F
after F
after X
after D
after X
after D
after B
before C
before X
before F
after F
after X
after C
after A
end
List size = 1
List size (a1111) = 4
List size = 2
List size (a1111)= 6
List size = 1
List size = (a1111) 0