1 -------- insert single '!' --------------------------------------------abcdefghi
2 jklmnop
\e[1;75H
\e[4h!
\e[4l
5 -------- insert 0-9, with wraparound ----------------------------------abcdefghi
6 jklmnop
\e[4;75H
\e[4h0123456789
\e[4l
8 -------- repeat 3 '!' -------------------------------------------------abcdefghi
9 jklmnop
\e[7;75H
\e[4h!
\e[2b
\e[4l
12 -------- repeat 10 '!', with wraparound -------------------------------abcdefghi
13 jklmnop
\e[10;75H
\e[4h!
\e[9b
\e[4l