import java.util.*;
import java.lang.Math;

class Main{
    public static void main(String[] args){
        Scanner sc = new Scanner(System.in);
        int[] x = {0,0,0,0,0,0};
        //         a,b,c,d,e
        for(int i = 0; i < x.length ; i++){
            x[i] = sc.nextInt();
        }
        int judge = 0;
        for(int i = 0;i < x.length-1;i++){
            for(int j = 1; j < x.length;j++){
                if(Math.abs(x[i] - x[j]) > x[5]){
                    judge = 1;
                }
            }
        }
        if(judge == 1){
            System.out.println(":(");
        }else{
            System.out.println("Yay!");
        }

    }
}
/tmp/hf-datasets-cache/medium/datasets/42704881117311-config-parquet-and-info-qiankunmu-Project_CodeNet-896c9d36/hub/datasets--qiankunmu--Project_CodeNet_Python800_and_Java250/snapshots/c899fde44a77ba1cc14973ed3de064e4ff3aadc7/Project_CodeNet_Java250.tar.gz