c1-c1
c1-g2
g2-g2
g2-c3
c3-c3
c3-g4
g4-g4
g4-t5
t5-t5
t5-t6
t7-t7
t7-t8
t8-t8
t8-c9
c9-c9
c9-g10
g10-g10
g10-c11
c11-c11
c11-g12