the recoded matrix in my last post should be :
1 1' 2 3 4 5
A + + + + + +
B + - + + + +
C + - + + - -
D + - - - - -
the derived state " 1' " (= derived absence of "1") is of course present
as an autapomorphy in A
could also be another, present, derived state " 1'' "