a3 a3 a3 s1a s1a s1a 132 132 132 s1s s1s s1s s312 s312 s312 a32 a32 a32 1s13 1s13 1s13 s12 s12 s12 31 31 31 s3a1 s3a1 s3a1 232s 232s 232s 2a32 2a32 2a32