Overlap   .A1..B2..C3..D4..E5..F6..G7.H8 ->   
  Interval --- --- --- --- --- --- --- ---
  Time     0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
Ø/Intvl     2/GRN   6/GRN   0/---   0/---