#instance of the whizzkids 1997 problem
# number of parents/teachers
#for each parent, number of conversations requested -
#                 for each conversation:  teacher index / length of conversation
#for each parent, for each conversation:  group index
#                                         (within group reordering is permitted)
#on official form teachers are labeled A,B,C,D,E,F,G,H,J,K,L,M,N,P,R

20 15
 7  4 16  1 20  5 12  6 39 11 13 12 10 13 13 
13  0 22  6 27  2 20  3 25  4 32  5  8  1 14  7 19  8  9  9 29 11 29 12 26 13  5 
10  1  9  3  9  4 15  6 29  7 52 11 24  8 29 12 13 13 19 14 27 
14  9 30  1 52  2 27  3 19  4 32  5 16  6 10  7  8  8 18  0 12 10 23 11 24 12 26 13 41 
10  0 16  1 18  2 17 11 33  4 18  7 56 10 13 12 22 13  7 14 13 
11  1 12  3  7  2 27  5 21  6 12  7  6  9 73 10 30 11 22 12 10 14 32 
 8  1  6  2 32  8 18  7 55 10  9 12 24 13 48 14 29 
10  0 18  2 27  3 60  5 21  8 31  6 22  9 26 11 13 13 16 14 26 
 6  0 34  1 18  2  9  9 29 11 20 13 12 
10  0 30  2 15  3 11  4 15  6 35  8 36 10 23 11 17 13 18 14 10 
10  0 30  3 17  4  8  5 12  6 12  7 15  8 34 10 11 12 13 14 26 
11  0 38  1 14  6 31  3 11  5 13  2 19  8 11  9 12 10 30 12 12 14 30 
10  0 30  3 55  4 31  5 18  9 17  8 25  7 15 10 33 13 13 14  8 
12  2 15  1 12  4 26  5 62  7 14  8 25  9 29 10 16 11 13 12  9 13 15 14 30 
10  0 28  1 45  2 22  5 10  3 23  7 16  8 18  9 12 10 31 12 24 
 9  1 23  2 15  3 21  5 14  7 21  9 15 10 16 12 13 14 23 
 7  2 10  5  9  6 37  7 19  4 10 13 18 14 10 
10  1 16 10 35  3 14  4 74  5 21  6 27  8 13  9 14 12 17 13  8 
10  1 23  2 23  3 25  0 36  6 14  9 11 11 89 12 71 13 15 14 15 
 9  1 17  2 20  4 18  8 27  5 59 10 28 12  8 13 42 14 18  

 

  0   1   2   3   3   3   4 
  5   6   7   8   8   8   9   9   9  10  10  11  11 
 12  13  13  14  14  15  15  16  16  17 
 18  18  19  20  20  21  21  21  22  22  23  24  24  25 
 26  27  28  28  28  29  29  30  30  31 
 32  32  33  33  34  34  35  36  37  38  38 
 39  40  41  42  42  43  44  45 
 46  47  47  48  49  50  50  51  52  52 
 53  54  55  55  56  57 
 58  59  59  60  61  61  62  63  64  64 
 65  66  67  67  68  68  68  69  69  70 
 71  71  72  73  74  74  74  75  76  76  77 
 78  78  78  79  80  80  81  82  83  83 
 84  84  84  85  85  85  86  86  87  87  88  89 
 90  90  91  91  91  92  92  93  94  94 
 95  96  97  98  98  98  99 100 100 
101 102 103 104 104 104 105 
106 106 107 107 107 108 109 110 111 111 
112 112 113 114 115 115 116 116 117 117 
118 118 119 120 120 121 122 123 123