The links you listed illustrate how to do that. It's comma-separated and order-dependent, so these are equivalent:
cmdline:
-1 ?l?u ?1?1?1
file:
?l?u,?1?1?1
... and:
cmdline:
-1 ?l?u -2 ?u?d ?1?2?2
file:
?l?u,?u?d,?1?2?2
... etc.
cmdline:
-1 ?l?u ?1?1?1
file:
?l?u,?1?1?1
... and:
cmdline:
-1 ?l?u -2 ?u?d ?1?2?2
file:
?l?u,?u?d,?1?2?2
... etc.
~