! pipedum_15b.scl ! 126/125, 128/125, 1029/1024, Paul Erlich, 2001 15 ! 21/20 35/32 8/7 25/21 5/4 21/16 175/128 256/175 32/21 8/5 42/25 7/4 64/35 40/21 2/1