Considering node I
   Deleting label (+ - +) due to lack of line label + at node H
Considering node J
   Deleting label (<  - > ) due to lack of line label >  at node L
   Deleting label (>  <  -) due to lack of line label <  at node L
   Deleting label (- - -) due to lack of line label - at node I
   Deleting label (- >  < ) due to lack of line label <  at node I
Considering node K
   Deleting label (<  > ) due to lack of line label >  at node L
   Deleting label (<  +) due to lack of line label >  at node L
   Deleting label (+ > ) due to lack of line label <  at node I
Considering node L
   Deleting label (+ - +) due to lack of line label + at node K
Considering node A
   Deleting label (<  + > ) due to lack of line label >  at node D
   Deleting label (- + -) due to lack of line label - at node D
Considering node E
   Deleting label (>  + < ) due to lack of line label + at node L
Considering node F
Considering node G
Considering node H
Considering node I
Considering node K
Considering node L
Considering node E
Considering node F
Considering node G
Considering node H
Considering node I
Considering node K
Considering node L
NIL

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