root system   reduced mass  #
-----------------------------
A13           1/2           1
D11           1/2           1
A1 A11        1/2           1
A4 E8         1/2           1
A5 E7         1/2           1
A6 E7         1/2           1
D6 E6         1/2           1
A1 A2 D9      1/2           1