missing arg (expect error) ...
umon: ERROR: type 'umon --help' for correct usage.
by default window and icon ...
0000000 033 135 060 073 150 145 154 154 157 007
        033   ]   0   ;   h   e   l   l   o  \a
0000012
window only ...
0000000 033 135 062 073 150 145 154 154 157 007
        033   ]   2   ;   h   e   l   l   o  \a
0000012
icon only ...
0000000 033 135 061 073 150 145 154 154 157 007
        033   ]   1   ;   h   e   l   l   o  \a
0000012
explicitly window and icon ...
0000000 033 135 060 073 150 145 154 154 157 007
        033   ]   0   ;   h   e   l   l   o  \a
0000012
all done