n=8000;
k=3;

B=inicializar(n);
chaves = randstring(10,1,1e4);
for i = 1:length(chaves)
    B=inserir(B, chaves{i}, k);
end
resp = zeros(1, length(chaves));
for i = 1:length(chaves)
    resp=verificar(B, chaves{i}, k);
end
fNegativo =