13 3 4 7 8 July 8, 2019 16 32 64 128 13 3 4 x 7 8 9 James 3 13 4 7 8a James 3 13 4 7 8 Hcf of 3 4 7 8 and 13 14 13 7 8 c 9 3 4 40 7 8 x 13 3 4 cambridge shingle
