To move the first item from one series to another, use the move word:
s: ["A" "B" "C"]move [1 2 3] s ;== [2 3]s ;== [1 "A" "B" "C"]
It returns the changed first series, but, as you can see, the second series is also changed. To move a number of items, use /part again in the code phrase move/part series1 series2 number.
=> Now answer question 11 from the Questions section.
Use swap to swap the first element(s) of two series. It returns the first series, but changes both:
swap [A B C][1 2 3] ;== [1 B C]
