Cartan #0:
split: 0; compact: 4; complex: 0
canonical twisted involution: e
twisted involution orbit size: 1; fiber size: 16; strong inv: 16
imaginary root system: B4
real root system is empty
complex factor is empty
real form #4: [0,2,5,8,10,13] (6)
real form #3: [1,4,6,11] (4)
real form #2: [3,9,12,14] (4)
real form #1: [7] (1)
real form #0: [15] (1)


Cartan #2:
split: 1; compact: 3; complex: 0
canonical twisted involution: 1,2,3,4,3,2,1
twisted involution orbit size: 4; fiber size: 8; strong inv: 32
imaginary root system: B3
real root system: A1
complex factor is empty
real form #4: [0,2,5] (3)
real form #3: [1,4,6] (3)
real form #2: [3] (1)
real form #1: [7] (1)