set foo 0 0 5
hello
set bar 0 0 5
barra
get foo bar
set foo 0 0 1
1
get foo
incr foo 2
incr foo 99999999999999999
incr foo 99999999999999999
incr foo 99999999999999999
incr foo 99999999999999999
incr foo 999999999999999999999999999
incr foo 999999999999999999999999999999999
incr foo 99999999999999999

set foo 0 0 5
hello
append foo 0 0 6
 world
get foo
prepend foo 0 0 4
Oh! 
get foo
quit