struct TrieNode * root = getNode(); 
struct TrieNode * sub_root = getNode(); 
    struct TrieNode * rule_0 = getNode(); 
    insert(sub_root, "1", 0, rule_0);
        insert(rule_0, "2", 1, rule_1);
        struct TrieNode * rule_2 = getNode(); 
        insert(rule_1, "3", 2, rule_2);
        struct TrieNode * rule_3 = getNode(); 
        insert(rule_2, "5", 3, rule_3);
        insert(rule_0, "2", 1, rule_4);
        struct TrieNode * rule_5 = getNode(); 
        insert(rule_4, "8", 2, rule_5);
        struct TrieNode * rule_3 = getNode(); 
        insert(rule_5, "5", 3, rule_3);
        insert(rule_3, "6", 2, NULL);
    struct TrieNode * rule_6 = getNode(); 
    insert(sub_root, "1", 0, rule_6);
        struct TrieNode * rule_7 = getNode(); 
        insert(rule_6, "2", 1, rule_7);
        struct TrieNode * rule_8 = getNode(); 
        insert(rule_7, "4", 2, rule_8);
        struct TrieNode * rule_9 = getNode(); 
        insert(rule_8, "5", 3, rule_9);
        insert(rule_9, "6", 4, NULL);
    struct TrieNode * rule_10 = getNode(); 
    insert(sub_root, "1", 0, rule_10);
        struct TrieNode * rule_11 = getNode(); 
        insert(rule_10, "2", 1, rule_11);
        struct TrieNode * rule_12 = getNode(); 
        insert(rule_11, "4", 2, rule_12);
        struct TrieNode * rule_13 = getNode(); 
        insert(rule_12, "5", 3, rule_13);
        insert(rule_13, "7", 4, NULL);