128
root:  *node1 *node2 *node3 *node4
node1: 0 *node5 *node6 1
node2: *node7 *node8 1 *node10
node3: 0 1 0 0
node4: *node18 0 0 0
node5: 0 *node11 *node12 1
node6: 0 *node13 *node14 1
node7: *node15 0 1 *node16
node8: 0 0 1 0 
node10: 1 0 1 *node17
node11: 0 1 1 1
node12: 0 1 1 1 
node13: 0 1 1 1
node14: 0 1 1 1
node15: 1 0 1 1
node16: 1 0 1 1
node17: 1 0 1 1
node18: 0 1 *node19 1
node19: 0 *node20 *node21 *node22
node20: 1 0 0 0 
node21: 0 0 1 1 
node22: 0 0 1 1