import java.util.*;
import java.util.regex.*;

class Demo {
    static public void main(String[] args) {
        String lock = "O_2_^-^";
        String str = " O_2_^-^ ";
        
        System.out.println(str);
        System.out.println(lock);
        System.out.println(str.contains(lock));
        str = str.replaceFirst(Pattern.quote(lock), "");
        System.out.println("|" + str + "|");
    }
}