-------- insert single '!' --------------------------------------------abcdefghi
jklmnop[1;75H[4h![4l


-------- insert 0-9, with wraparound ----------------------------------abcdefghi
jklmnop[4;75H[4h0123456789[4l

-------- repeat 3 '!' -------------------------------------------------abcdefghi
jklmnop[7;75H[4h![2b[4l


-------- repeat 10 '!', with wraparound -------------------------------abcdefghi
jklmnop[10;75H[4h![9b[4l