uint static_sequence_wvtree::rankLessThan(uint &symbol, uint pos) {
uint s = am->map(symbol);
// std::cout << "lessthan..." << std::endl;
uint static_sequence_wvtree::rankLessThan(uint &symbol, uint pos) {
uint s = am->map(symbol);
// std::cout << "lessthan..." << std::endl;