group_A → group_D 3
group_C → group_F 3
group_E → group_H 3
group_A → group_C 2
group_B → group_E 2
group_C → group_G 1
group_A5
group_B2
group_C4
group_E3
group_D3
group_F3
group_G1
group_H3