graph "RHM stemma" {
  0 [ class=hypothetical ];
  1 [ class=hypothetical ];
  10 [ class=hypothetical ];
  11 [ class=hypothetical ];
  2 [ class=hypothetical ];
  3 [ class=hypothetical ];
  4 [ class=hypothetical ];
  5 [ class=hypothetical ];
  6 [ class=hypothetical ];
  7 [ class=hypothetical ];
  8 [ class=hypothetical ];
  9 [ class=hypothetical ];
  A [ class=extant ];
  B [ class=extant ];
  C [ class=extant ];
  D [ class=extant ];
  F [ class=extant ];
  J [ class=extant ];
  L [ class=extant ];
  M [ class=extant ];
  S [ class=extant ];
  T1 [ class=extant ];
  T2 [ class=extant ];
  U [ class=extant ];
  V [ class=extant ];
  0 -- 1;
  0 -- C;
  10 -- 11;
  10 -- 9;
  10 -- V;
  11 -- F;
  11 -- U;
  1 -- 2;
  1 -- M;
  2 -- 3;
  2 -- D;
  3 -- 4;
  4 -- 5;
  5 -- 6;
  6 -- 7;
  7 -- 8;
  8 -- 9;
  A -- 6;
  B -- 4;
  J -- 5;
  L -- 3;
  S -- 9;
  T1 -- 8;
  T2 -- 7;
}