! pipedum_27a.scl ! 126/126, 1728/1715, 64/63, Paul Erlich, 2001 27 ! 36/35 21/20 15/14 10/9 8/7 7/6 6/5 49/40 5/4 9/7 4/3 48/35 7/5 10/7 35/24 3/2 14/9 8/5 80/49 5/3 12/7 7/4 9/5 28/15 40/21 35/18 2/1