## Grassmann graph J_2(5,2) from PGammaL(5,2) grassmann252:=EdgeOrbitsGraph( Group( [ ( 1, 2)( 3, 5)( 4, 6)( 7, 10)( 8, 12)( 9, 14)( 11, 17)( 13, 20)( 15, 22)( 16, 24)( 18, 27)( 19, 28) ( 23, 32)( 25, 35)( 26, 36)( 29, 37)( 30, 39)( 31, 41)( 33, 44)( 34, 45)( 38, 46)( 40, 51)( 42, 54)( 43, 56) ( 47, 61)( 48, 55)( 49, 57)( 50, 65)( 52, 68)( 53, 69)( 58, 59)( 60, 76)( 62, 70)( 63, 80)( 64, 77)( 66, 83) ( 67, 85)( 71, 89)( 72, 91)( 73, 92)( 74, 84)( 75, 86)( 79, 99)( 82,101)( 88,107)( 90,110)( 93,102)( 95,111) ( 96,116)( 98,118)(103,123)(106,126)(109,129)(132,142)(144,149)(148,152), ( 1, 3, 5, 8, 13)( 2, 4, 7, 11, 18)( 6, 9, 15, 23, 33)( 10, 16, 25, 20, 28)( 12, 19, 29, 24, 34) ( 14, 21, 30, 40, 52)( 17, 26, 37, 48, 63)( 22, 31, 42, 55, 72)( 27, 38, 49, 64, 81)( 32, 43, 57, 74, 94) ( 35, 46, 60, 77, 97)( 36, 47, 62, 79,100)( 39, 50, 66, 84,104)( 41, 53, 70, 88,108)( 44, 58, 75, 95,115) ( 45, 59, 76, 96,117)( 51, 67, 86,105,125)( 54, 71, 90,111,131)( 56, 73, 93,114,134)( 61, 78, 98,119, 68) ( 65, 82,102,122,138)( 69, 87,106,127,141)( 80, 89,109,116,135)( 83,103,124,118,136)( 85, 92,113,133,145) ( 91,112,132,144,150)( 99,120,129,123,139)(101,121,137,146,151)(107,128,142,148,153)(110,130,143,149,154) (126,140,147,152,155) ] ), [1,2] );