" <-APL2-------------------- sam219.txt ---------------------------->
" <----------------------------- 42 -------------------------------->
v # 10 20 30 40
(2Yv)#100 200
v
a#'abcd'
(a)#10 20 30
a
a#'abcd'
(Ya)#10 20 30
a
a#'abcd'
(2`Xa)#10 20 30
a
a#(12 13)(22 23 24 25)(310 320)
(3Y2`Xa)#'abc'
a
)off