a1a1a2a2a3a3a4a4a5a5a6a6a7a7a8a8a9a9a10a10a11a11a12a12a13a13a14a14a15a15a16a16a17a17a18a18a19a19a20a20a21a21a22a22a23a23a24a24a25a25a26a26a27a27a28a28a29a29a30a30a31a31a32a32b1b1b2b2b3b3b4b4b5b5b6b6b7b7b8b8b9b9b10b10b11b11b12b12b13b13b14b14b15b15b16b16b17b17b18b18b19b19b20b20b21b21b22b22b23b23b24b24b25b25b26b26b27b27b28b28b29b29b30b30b31b31b32b32c1c1c2c2c3c3c4c4c5c5c6c6c7c7c8c8c9c9c10c10c11c11c12c12c13c13c14c14c15c15c16c16c17c17c18c18c19c19c20c20c21c21c22c22c23c23c24c24c25c25c26c26c27c27c28c28c29c29c30c30c31c31c32c32