cond %{SEND_RESPONSE_HDR_HOOK} [AND]
cond %{CLIENT-HEADER:X-Outer} ="" [AND,NOT]
cond %{GROUP}
    cond %{CLIENT-HEADER:X-Inner-A} ="" [OR,NOT]
    cond %{CLIENT-HEADER:X-Inner-B} ="" [NOT]
cond %{GROUP:END}
    set-header X-Result "matched"
