[#sub:1,  #id:"r1o", #G2RoomSub:1, #oppG2WallSub:2]
[#sub:2,  #id:"r1i", #G2RoomSub:1, #oppG2WallSub:1]
[#sub:3,  #id:"r2o", #G2RoomSub:2, #oppG2WallSub:4]
[#sub:4,  #id:"r2i", #G2RoomSub:2, #oppG2WallSub:3]
[#sub:5,  #id:"r3o", #G2RoomSub:3, #oppG2WallSub:6]
[#sub:6,  #id:"r3i", #G2RoomSub:3, #oppG2WallSub:5]
[#sub:7,  #id:"r4o", #G2RoomSub:4, #oppG2WallSub:8]
[#sub:8,  #id:"r4i", #G2RoomSub:4, #oppG2WallSub:7]
[#sub:9,  #id:"r5o", #G2RoomSub:5, #oppG2WallSub:10]
[#sub:10, #id:"r5i", #G2RoomSub:5, #oppG2WallSub:9]
[#sub:11, #id:"r6o", #G2RoomSub:6, #oppG2WallSub:12]
[#sub:12, #id:"r6i", #G2RoomSub:6, #oppG2WallSub:11]
[#sub:13, #id:"r7o", #G2RoomSub:7, #oppG2WallSub:14]
[#sub:14, #id:"r7i", #G2RoomSub:7, #oppG2WallSub:13]
[#sub:15, #id:"r8o", #G2RoomSub:8, #oppG2WallSub:16]
[#sub:16, #id:"r8i", #G2RoomSub:8, #oppG2WallSub:15]
[#sub:17, #id:"c",   #G2RoomSub:9, #oppG2WallSub:18]
[#sub:18, #id:"f",   #G2RoomSub:9, #oppG2WallSub:17]