#n_interactions_quadruplet 6
i  j  da_j db_j dc_j  k da_k db_k dc_k  l da_l db_l dc_l   Q
0  0     1    0    0  0    1    1    0  0    0    1    0  1.0
0  0     1    1    0  0    0    1    0  0   -1    0    0  1.0
0  0     0    1    0  0   -1    0    0  0   -1   -1    0  1.0
0  0    -1    0    0  0   -1   -1    0  0    0   -1    0  1.0
0  0    -1   -1    0  0    0   -1    0  0    1    0    0  1.0
0  0     0   -1    0  0    1    0    0  0    1    1    0  1.0
