H
g/./m0
g//a\
hello world
# lines beginning with a `#' should be ignored
g/hello /# including in global commands \
s/lo/p!/\
a\
order\
.\
# and in the command list \
i\
caos\
.\
-1s/l/L
u
u
17,33g/[A-I]/-1d\
+1c\
hello world\
.\
47
;d
# don't change current address if no match
g/xxx/1d
;j
g/heLp! world//caos/d\
-;/order/;d
# to be undone
g/./s//x/g
u
w out.o