class Node {
private:
    int priority;
public:
    Node(int priority) :
        priority(priority) {
    }

    bool get_priority() {
        return priority;
    }
};


class Edge {
private:
    Node node;
    char value;
public:
    Edge(int node, int value) :
            node(node), value(value) {
    }

    int getNode() {
        return node;
    }

    int getValue() {
        return value;
    }
};

class NFA {
private:
    vector<vector<Edge> > graph;
    int size;
public:
    NFA () : size(0) {
    }

    void addKeyword(string word) {

    }

    void addPunct(char punt) {

    }

    void addDefinition(string def) {

    }

    void addExpression(string exp) {

    }

    vector<vector<Edge> > generateGraph() {
        vector<vector<Edge> > final_graph;
        return final_graph;
    }
};