yp1 := (1,3,5,8,11,15,19)(2,4,7,10,14,18,23)(6,9,13,17,22,26,30)(12,16,21,25,
     29,33,39)(20,24,28,32,37,43,51)(27,31,36,41,48,57,67)(34,40,46,54,63,74,
     86)(38,44,52,61,72,84,98)(42,49,58,69,81,95,104)(45,53,62,73,85,99,107)
     (47,55,64,76,89,79,93)(50,59,70,82,96,105,109)(56,65,77,91,66,78,92)(60,
     71,83,97,106,110,114)(68,80,94,103,108,112,116)(75,87,100,88,101,90,102)
     (111,115,119,122,125,126,127)(113,117,120,123,118,121,124);