print("""ABCDEFGHIJKLMNOPQR BABCDEFGHIJKLMNOPQ CBABCDEFGHIJKLMNOP DCBABCDEFGHIJKLMNO EDCBABCDEFGHIJKLMN FEDCBABCDEFGHIJKLM GFEDCBABCDEFGHIJKL HGFEDCBABCDEFGHIJK IHGFEDCBABCDEFGHIJ JIHGFEDCBABCDEFGHI""")
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