V =
(0:-1)[10:21:21]
(1:-1)[15:15:15]
(2:-1)[43:1:1]
(3:-1)[34:17:17]
(4:-1)[0:32:32]
(5:-1)[42:3:3]
(6:-1)[0:4:4]
(7:-1)[32:41:41]
(8:-1)[19:13:13]
(9:-1)[37:39:39]
(10:-1)[24:30:30]
(11:-1)[38:33:33]
(12:-1)[16:0:0]
(13:-1)[18:18:18]
(14:-1)[28:43:43]
(15:-1)[35:23:23]
(16:-1)[6:11:11]
(17:-1)[7:42:42]
(18:-1)[1:16:16]
(19:-1)[23:12:12]
(20:-1)[30:37:37]
(21:-1)[21:34:34]
(22:-1)[29:0:0]
(23:-1)[20:31:31]
(24:-1)[22:6:6]
(25:-1)[33:38:38]
(26:-1)[14:0:0]
(27:-1)[12:28:28]
(28:-1)[0:40:40]
(29:-1)[13:0:0]
(30:-1)[0:36:36]
(31:-1)[4:0:0]
(32:-1)[5:27:27]
(33:-1)[40:20:20]
(34:-1)[17:7:7]
(35:-1)[31:9:9]
(36:-1)[2:8:8]
(37:-1)[0:14:14]
(38:-1)[39:0:0]
(39:-1)[27:29:29]
(40:-1)[41:26:26]
(41:-1)[8:10:10]
(42:-1)[25:24:24]
(43:-1)[36:5:5]
(44:-1)[0:2:2]
(45:-1)[11:19:19]
(46:-1)[26:22:22]
(47:-1)[9:0:0]
(48:-1)[0:0:0]
(49:-1)[3:35:35]
(50:-1)[0:25:25]
E =
{1,0} (-1)
{7,0} (-1)
{2,1} (-1)
{8,1} (-1)
{3,2} (-1)
{9,2} (-1)
{4,3} (-1)
{10,3} (-1)
{11,4} (-1)
{6,5} (-1)
{13,5} (-1)
{8,7} (-1)
{15,7} (-1)
{9,8} (-1)
{16,8} (-1)
{10,9} (-1)
{11,10} (-1)
{17,10} (-1)
{12,11} (-1)
{13,12} (-1)
{18,12} (-1)
{14,13} (-1)
{16,15} (-1)
{20,16} (-1)
{22,18} (-1)
{26,20} (-1)
{22,21} (-1)
{29,21} (-1)
{23,22} (-1)
{30,22} (-1)
{24,23} (-1)
{31,23} (-1)
{26,25} (-1)
{33,25} (-1)
{27,26} (-1)
{34,26} (-1)
{28,27} (-1)
{35,27} (-1)
{29,28} (-1)
{36,28} (-1)
{30,29} (-1)
{37,29} (-1)
{31,30} (-1)
{38,30} (-1)
{32,31} (-1)
{39,31} (-1)
{34,33} (-1)
{35,34} (-1)
{41,34} (-1)
{36,35} (-1)
{42,35} (-1)
{37,36} (-1)
{38,37} (-1)
{39,38} (-1)
{43,38} (-1)
{40,39} (-1)
{44,39} (-1)
{42,41} (-1)
{46,42} (-1)
{44,43} (-1)
{48,43} (-1)
{45,44} (-1)
{49,44} (-1)
{14,6} (-1)
{19,14} (-1)
{24,19} (-1)
{32,24} (-1)
{40,32} (-1)
{45,40} (-1)
{50,45} (-1)
{48,47} (-1)
{49,48} (-1)
{50,49} (-1)