yes ltatw ht nt is possible, but donts exis ht at or ht am nt is impossible.
samuelff budz ever do tatw ahm or am ahm or m ahm nt but t hm is possible, for exemple, u do tatw with your sf and complete the hm with wf to (end in sf), but in t ahm the diference is that u do tatw with your sf and ahm with sf in the end, this is the most difference, sorry for my bulshit english, but i try.

if u mean htatw-amatw (nt) is impossible, ur wrong
it´s htlmatw
no, I think it's skmatw
htatw must end on the opposite foot that starts ;)
To be honest I've never really understood all that, htatw-amatw is the same as skmatw without a touch. Same with hltatw, shouldn't it be atw-alatw? Oh well.
no, see, in other words htatw is hatw-htw (nt)
and atw-alatw (nt) is also not possible, only hatw - alatw (nt) is possible
let me explain it:
if u do the a revolution with ur left foot and then 2 with ur right one, ur doing hatw-alatw (nt)/htlatw, because if u "forget the 2nd and 3rd revolution for a moment", then u just go around with ur left leg and catch it with ur right foot
and that´s not atw, its hatw
hard to explain