import java.util.regex.Matcher;
import java.util.regex.Pattern;
import java.util.Scanner;
 
class Solution{
	public static void main(String[] args){
		Scanner in = new Scanner(System.in);
		while(in.hasNext()){
			String IP = in.next();
			System.out.println("IP->"+isValidIP(IP));
		}
	}
 
	public static boolean isValidIP(String IP){
		String [] parts = IP.split("\\.");
 
		// check for exactly 4 parts
		if(parts.length!=4){
			return false;
		}
 
		for(String part :parts){
			// check if numeric
			if(!part.matches("\\d+")){
				return false;
			}
 
			// parse to int
			int num = Integer.parseInt(part);
 
			// check range
			if(num <0 || num > 255){
				return false;
			}
		}
 
		return true;
	}
}

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1.1.1.1
128.230.124.124
127.0.0.1
256.2.4.10
.4.1.8.8