refactor(ccc): less magic numbers

[lispc]

Remove some magic numbers.

we can update "avg_trie_depth" later. Seems 35 even 32 would be safe enough?

trie_depth 22, hash num 3511, mpt update num 154
trie_depth 24, hash num 9280, mpt update num 385
trie_depth 23, hash num 6649, mpt update num 284
trie_depth 21, hash num 4629, mpt update num 212
trie_depth 25, hash num 3842, mpt update num 151
trie_depth 26, hash num 5874, mpt update num 220
trie_depth 29, hash num 7464, mpt update num 250
trie_depth 25, hash num 5036, mpt update num 195
trie_depth 24, hash num 4574, mpt update num 186
trie_depth 25, hash num 5271, mpt update num 209
trie_depth 19, hash num 5295, mpt update num 267
trie_depth 20, hash num 6442, mpt update num 311
trie_depth 26, hash num 3622, mpt update num 137
trie_depth 27, hash num 4786, mpt update num 176
trie_depth 30, hash num 3023, mpt update num 100
trie_depth 30, hash num 4349, mpt update num 141
trie_depth 24, hash num 6961, mpt update num 287
trie_depth 20, hash num 5072, mpt update num 249
trie_depth 22, hash num 5596, mpt update num 246
trie_depth 22, hash num 4962, mpt update num 216
trie_depth 23, hash num 1960, mpt update num 85
trie_depth 24, hash num 9751, mpt update num 394
trie_depth 26, hash num 5080, mpt update num 194
trie_depth 25, hash num 2292, mpt update num 90
trie_depth 25, hash num 2296, mpt update num 90