import java.util.*;

public class CommentStripper {
    
    private StaticTransitionTable transitions;
    private StringBuilder sb;
    private int index;
    private int state;
    private final char EOF = '@';

    public CommentStripper(String src) {
        sb = new StringBuilder(src);
        transitions = new StaticTransitionTable(7, new char[]{'/', '*', '\n'});
        createTransitions();
    }
    
    private void createTransitions() {
        newTransition(0, 1, '/');
        newTransition(1, 3, '/');
        newTransition(1, 4, '*');
        newTransition(3, 2, '\n');
        newTransition(4, 5, '*');
        newTransition(5, 6, '/');
    }
    
    private boolean newTransition(int state1, int state2, char symbol) {
        return transitions.newTransition(state1, state2, symbol);
    }
    
    public String strip() {
        runFSM();
        return sb.toString();
    }
    
    private void runFSM() {
        this.state = 0;
        char symbol = nextChar();
        do {
            int next = nextState(state, symbol);
            transition(next);
            process(this.state);
            symbol = nextChar();
        }while(symbol != EOF);
    }
    
    private void transition(int next) {
        if(next > -1) {
            this.state = next;
        }
    }
    
    private void process(int state) {
        
        //not in a comment
        if(state == 0 || state == 2) {
            ;
        }else { 
            //in a comment, do action to the 
            //character we just examined
            doAction(this.index-1);
        }

        //final state
        //comment replaced
        //start FSM at initial state
        if(state == 2 || state == 6)
            this.state = 0;
    }
    
    //Override this to do whatever
    //you want with the comment character
    //I just remove it and reset the current character index.
    private void doAction(int index) {
         sb.replace(index, index+1, "");
         this.index--;
    }
    
    private int nextState(int state, char symbol) {
        return transitions.next(state, symbol);
    }
    
    private char nextChar() {
        if(this.index >= sb.length())
            return EOF;
        return sb.charAt(this.index++);
    }
}