\ ============================== 3.6 =========================================

\          Given:          How do you get:
\          1 2 3           3 2 1
: ass36.1.1 1 2 3 rot rot swap .s 2drop drop ;

\          1 2 3           1 2 3 2
: ass36.1.2 1 2 3 over .s 2drop 2drop ;

\          1 2 3           1 2 3 3
: ass36.1.3 1 2 3 dup .s 2drop 2drop ;

\          1 2 3           1 3 3
: ass36.1.4 1 2 3 swap drop dup .s 2drop drop ;

\          1 2 3           2 1 3
: ass36.1.5 1 2 3 rot swap .s 2drop drop ;

\          1 2 3 4         4 3 2 1
: ass36.1.6 1 2 3 4 swap 2swap swap ;

\          1 2 3           1 2 3 1 2 3
\          1 2 3 4         1 2 3 4 1 2
\          1 2 3
\          1 2 3           1 2 3 4
\          1 2 3           1 3


\ Assignment: Write 17^3 and 17^4 in Forth, without writing 17 more than once.
\ Write a piece of Forth code that expects two numbers on the stack (a and b,
\ with b on top) and computes (a-b)(a+1). 

: ass36.2 17 dup dup * * ;
: ass36.3 17 dup 2dup * * * ;
: ass36.4 ( a b -- erg)
	over swap - swap 1 + * ;