AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
ABBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBA
ABCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCBA
ABCDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDCBA
ABCDEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEDCBA
ABCDEFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEDCBA
ABCDEFGGGGGGGGGGGGGGGGGGGGGGGGGGGGFEDCBA
ABCDEFGHHHHHHHHHHHHHHHHHHHHHHHHHHGFEDCBA
ABCDEFGHIIIIIIIIIIIIIIIIIIIIIIIIHGFEDCBA
ABCDEFGHIJJJJJJJJJJJJJJJJJJJJJJIHGFEDCBA
ABCDEFGHIJKKKKKKKKKKKKKKKKKKKKJIHGFEDCBA
ABCDEFGHIJKLLLLLLLLLLLLLLLLLLKJIHGFEDCBA
ABCDEFGHIJKLLLLLLLLLLLLLLLLLLKJIHGFEDCBA
ABCDEFGHIJKKKKKKKKKKKKKKKKKKKKJIHGFEDCBA
ABCDEFGHIJJJJJJJJJJJJJJJJJJJJJJIHGFEDCBA
ABCDEFGHIIIIIIIIIIIIIIIIIIIIIIIIHGFEDCBA
ABCDEFGHHHHHHHHHHHHHHHHHHHHHHHHHHGFEDCBA
ABCDEFGGGGGGGGGGGGGGGGGGGGGGGGGGGGFEDCBA
ABCDEFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEDCBA
ABCDEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEDCBA
ABCDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDCBA
ABCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCBA
ABBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBA
AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA