#!/bin/sh -
../ed - <<\EOT
r \u.d
1;r u.t
u
a
hello
world
.
g/./s//x/\
a\
hello\
world
u
u
u
a
hello world!
.
u
1,$d
u
2,3d
u
c
hello world!!
.
u
u
-1;.,+1j
u
u
u
.,+1t$
w \u.o
EOT