1 2 3 4 5 6 7 8 9 10 11 12 13 14
! misca.scl ! 21/20 x 20/19 x 19/18=7/6 7/6 x 8/7=4/3 9 ! 21/20 21/19 7/6 4/3 3/2 63/40 63/38 7/4 2/1