13s 13s 13s 3s 3s 3s 132 132 132 s1a s1a s1a a1 a1 a1 32 32 32 3s1 3s1 3s1 a3a a3a a3a a3a a3a a3a 12 12 12 1sa 1sa 1sa s2 s2 s2 as23 as23 as23 s2 s2 s2