#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    : 0     0     32768 [ 0     0     0     0     0     0     0     0     0     0     0     0     0     0     ]
#1    : 8196  1     16380 [ 0     0     1     0     0     0     0     0     0     0     0     0     0     1     ]