$C_1$

$C_2$

$C_3$

$C_4$

$A_1$

$\left\{s_3,s_{3.5},s_4\right\}$

$\left\{s_4,s_{4.5},s_5\right\}$

$\left\{s_2,s_3,s_4\right\}$

$\left\{s_3,s_3,s_3\right\}$

$A_2$

$\left\{s_5,s_{5.5},s_6\right\}$

$\left\{s_4,s_{4.5},s_5\right\}$

$\left\{s_4,s_4,s_4\right\}$

$\left\{s_5,s_{5.5},s_6\right\}$

$A_3$

$\left\{s_4,s_4,s_4\right\}$

$\left\{s_5,s_{5.5},s_6\right\}$

$\left\{s_4,s_4,s_4\right\}$

$\left\{s_1,s_{1.5},s_2\right\}$

$A_4$

$\left\{s_2,s_3,s_4\right\}$

$\left\{s_3,s_{3.5},s_4\right\}$

$\left\{s_4,s_{4.5},s_5\right\}$

$\left\{s_4,s_{4.5},s_5\right\}$