#group: free  frags first [ 2^0   2^1   2^2   2^3   2^4   2^5   2^6   2^7   2^8   2^9   2^10  2^11  2^12  2^13  ]
#0    : 12427 1     20341 [ 1     1     0     1     0     0     0     1     0     0     0     0     1     1     ]
#1    : 32766 1     2     [ 0     1     1     1     1     1     1     1     1     1     1     1     1     3     ]