import java.util.*;

public class Main{
  public static void main(String args[]){
    Scanner sc = new Scanner(System.in);
    int[] A = new int[5];
    int s,o,k,flag;

    for(s = 0;s < 5;s++){
      A[s] = sc.nextInt();
    }
    k = sc.nextInt();
    flag = 0;

    for(s = 0;s < 4;s++){
      for(o = s+1;o < 5;o++){
        if(k < sum(A[s],A[o])){
          flag = 1;
          break;
        }
      }
      if(flag == 1){
        break;
      }
    }

    if(flag == 0)
      System.out.println("Yay!");
    else
      System.out.println(":(");

  }

  public static int sum(int a,int b){
    if(a > b)
      return a-b;
    else
      return b-a;
  }

} import java.util.*; util.* java public class Main{
  public static void main(String args[]){
    Scanner sc = new Scanner(System.in);
    int[] A = new int[5];
    int s,o,k,flag;

    for(s = 0;s < 5;s++){
      A[s] = sc.nextInt();
    }
    k = sc.nextInt();
    flag = 0;

    for(s = 0;s < 4;s++){
      for(o = s+1;o < 5;o++){
        if(k < sum(A[s],A[o])){
          flag = 1;
          break;
        }
      }
      if(flag == 1){
        break;
      }
    }

    if(flag == 0)
      System.out.println("Yay!");
    else
      System.out.println(":(");

  }

  public static int sum(int a,int b){
    if(a > b)
      return a-b;
    else
      return b-a;
  }

} Main public static void main(String args[]){
    Scanner sc = new Scanner(System.in);
    int[] A = new int[5];
    int s,o,k,flag;

    for(s = 0;s < 5;s++){
      A[s] = sc.nextInt();
    }
    k = sc.nextInt();
    flag = 0;

    for(s = 0;s < 4;s++){
      for(o = s+1;o < 5;o++){
        if(k < sum(A[s],A[o])){
          flag = 1;
          break;
        }
      }
      if(flag == 1){
        break;
      }
    }

    if(flag == 0)
      System.out.println("Yay!");
    else
      System.out.println(":(");

  } main {
    Scanner sc = new Scanner(System.in);
    int[] A = new int[5];
    int s,o,k,flag;

    for(s = 0;s < 5;s++){
      A[s] = sc.nextInt();
    }
    k = sc.nextInt();
    flag = 0;

    for(s = 0;s < 4;s++){
      for(o = s+1;o < 5;o++){
        if(k < sum(A[s],A[o])){
          flag = 1;
          break;
        }
      }
      if(flag == 1){
        break;
      }
    }

    if(flag == 0)
      System.out.println("Yay!");
    else
      System.out.println(":(");

  } Scanner sc = new Scanner(System.in); sc new Scanner(System.in) int[] A = new int[5]; A new int[5] 5 int s s o o k k flag; flag for(s = 0;s < 5;s++){
      A[s] = sc.nextInt();
    } s = 0; s = 0 s 0 s < 5 s 5 s++ s++ s {
      A[s] = sc.nextInt();
    } {
      A[s] = sc.nextInt();
    } A[s] = sc.nextInt() A[s] A s sc.nextInt() sc.nextInt sc k = sc.nextInt() k sc.nextInt() sc.nextInt sc flag = 0 flag 0 for(s = 0;s < 4;s++){
      for(o = s+1;o < 5;o++){
        if(k < sum(A[s],A[o])){
          flag = 1;
          break;
        }
      }
      if(flag == 1){
        break;
      }
    } s = 0; s = 0 s 0 s < 4 s 4 s++ s++ s {
      for(o = s+1;o < 5;o++){
        if(k < sum(A[s],A[o])){
          flag = 1;
          break;
        }
      }
      if(flag == 1){
        break;
      }
    } {
      for(o = s+1;o < 5;o++){
        if(k < sum(A[s],A[o])){
          flag = 1;
          break;
        }
      }
      if(flag == 1){
        break;
      }
    } for(o = s+1;o < 5;o++){
        if(k < sum(A[s],A[o])){
          flag = 1;
          break;
        }
      } o = s+1; o = s+1 o s+1 s 1 o < 5 o 5 o++ o++ o {
        if(k < sum(A[s],A[o])){
          flag = 1;
          break;
        }
      } {
        if(k < sum(A[s],A[o])){
          flag = 1;
          break;
        }
      } if(k < sum(A[s],A[o])){
          flag = 1;
          break;
        } k < sum(A[s],A[o]) k sum(A[s],A[o]) sum A[s] A s A[o] A o {
          flag = 1;
          break;
        } flag = 1 flag 1 break; if(flag == 1){
        break;
      } flag == 1 flag 1 {
        break;
      } break; if(flag == 0)
      System.out.println("Yay!");
    else
      System.out.println(":("); flag == 0 flag 0 System.out.println("Yay!") System.out.println System.out System System.out "Yay!" System.out.println(":(") System.out.println System.out System System.out ":(" String args[] args public static int sum(int a,int b){
    if(a > b)
      return a-b;
    else
      return b-a;
  } sum {
    if(a > b)
      return a-b;
    else
      return b-a;
  } if(a > b)
      return a-b;
    else
      return b-a; a > b a b return a-b; a-b a b return b-a; b-a b a int a a int b b public class Main{
  public static void main(String args[]){
    Scanner sc = new Scanner(System.in);
    int[] A = new int[5];
    int s,o,k,flag;

    for(s = 0;s < 5;s++){
      A[s] = sc.nextInt();
    }
    k = sc.nextInt();
    flag = 0;

    for(s = 0;s < 4;s++){
      for(o = s+1;o < 5;o++){
        if(k < sum(A[s],A[o])){
          flag = 1;
          break;
        }
      }
      if(flag == 1){
        break;
      }
    }

    if(flag == 0)
      System.out.println("Yay!");
    else
      System.out.println(":(");

  }

  public static int sum(int a,int b){
    if(a > b)
      return a-b;
    else
      return b-a;
  }

} public class Main{
  public static void main(String args[]){
    Scanner sc = new Scanner(System.in);
    int[] A = new int[5];
    int s,o,k,flag;

    for(s = 0;s < 5;s++){
      A[s] = sc.nextInt();
    }
    k = sc.nextInt();
    flag = 0;

    for(s = 0;s < 4;s++){
      for(o = s+1;o < 5;o++){
        if(k < sum(A[s],A[o])){
          flag = 1;
          break;
        }
      }
      if(flag == 1){
        break;
      }
    }

    if(flag == 0)
      System.out.println("Yay!");
    else
      System.out.println(":(");

  }

  public static int sum(int a,int b){
    if(a > b)
      return a-b;
    else
      return b-a;
  }

} Main
import java.util.*;

public class Main{
  public static void main(String args[]){
    Scanner sc = new Scanner(System.in);
    int[] A = new int[5];
    int s,o,k,flag;

    for(s = 0;s < 5;s++){
      A[s] = sc.nextInt();
    }
    k = sc.nextInt();
    flag = 0;

    for(s = 0;s < 4;s++){
      for(o = s+1;o < 5;o++){
        if(k < sum(A[s],A[o])){
          flag = 1;
          break;
        }
      }
      if(flag == 1){
        break;
      }
    }

    if(flag == 0)
      System.out.println("Yay!");
    else
      System.out.println(":(");

  }

  public static int sum(int a,int b){
    if(a > b)
      return a-b;
    else
      return b-a;
  }

}
