How to sort out elements from matrix

I have a quite large matrix and I want to find out which elements are alike.

h =

     8    61    65
    12     2    15
    12     2    27
    12    15    27
    12    34    37
    12    34    41
    16    12    14
    16    14    16
    24    20    28
    24    22    26
    24    22    28
    24    22    29
    24    26    29
    28    71    73
    28    71    76
    28    73    76

The first colonn displays the number of axis. The second and third colonn displays the position of similar axis. I want to sort out all the positions that are similar.

in this example i want a matrix or several vector which displays the positions with similar axis;

 61 65 [] [] [];
 2  15 27 [] [];
 34 37 41 [] [];
 12 14 16 [] [];
 20 22 26 28 29;
 71 73 76 [] []