17 17 1 ## cyclic group abcdefghijklmnopq bcdefghijklmnopqa cdefghijklmnopqab defghijklmnopqabc efghijklmnopqabcd fghijklmnopqabcde ghijklmnopqabcdef hijklmnopqabcdefg ijklmnopqabcdefgh jklmnopqabcdefghi klmnopqabcdefghij lmnopqabcdefghijk mnopqabcdefghijkl nopqabcdefghijklm opqabcdefghijklmn pqabcdefghijklmno qabcdefghijklmnop