import java.util.Scanner;

public class Main {

    
    public static void main(String[] args) {
        Scanner tc = new Scanner (System.in);
        int a,b,c,d,e,k, soma1, soma2, soma3,soma4,soma5, soma6,soma7,soma8, soma9, soma10;
        a=tc.nextInt();
                b=tc.nextInt();

                        c=tc.nextInt();

                                d=tc.nextInt();

                                        e=tc.nextInt();

                                              k  =tc.nextInt();

        if((a<b) && (b<c) && (c<d) && (d<e)){
            soma1= b-a;
            soma2= c-a;
            soma3= d-a;
            soma4= e-a;
            soma5=  c-b;
            soma6= d-b;
            soma7= e-b;
            soma8= d- c;
            soma9= e-c;
            soma10= e-d;
            if((soma1<=k) && (soma2<=k)&& (soma3<=k) && (soma4<=k) && (soma5<=k) && (soma6<=k) && (soma7<=k) && (soma8<=k) && (soma9<=k) && (soma10<=k) ){
                System.out.println("Yay!");
    }else{
                System.out.println(":(");
            }
        }
    }
} import java.util.Scanner; Scanner java.util public class Main {

    
    public static void main(String[] args) {
        Scanner tc = new Scanner (System.in);
        int a,b,c,d,e,k, soma1, soma2, soma3,soma4,soma5, soma6,soma7,soma8, soma9, soma10;
        a=tc.nextInt();
                b=tc.nextInt();

                        c=tc.nextInt();

                                d=tc.nextInt();

                                        e=tc.nextInt();

                                              k  =tc.nextInt();

        if((a<b) && (b<c) && (c<d) && (d<e)){
            soma1= b-a;
            soma2= c-a;
            soma3= d-a;
            soma4= e-a;
            soma5=  c-b;
            soma6= d-b;
            soma7= e-b;
            soma8= d- c;
            soma9= e-c;
            soma10= e-d;
            if((soma1<=k) && (soma2<=k)&& (soma3<=k) && (soma4<=k) && (soma5<=k) && (soma6<=k) && (soma7<=k) && (soma8<=k) && (soma9<=k) && (soma10<=k) ){
                System.out.println("Yay!");
    }else{
                System.out.println(":(");
            }
        }
    }
} Main public static void main(String[] args) {
        Scanner tc = new Scanner (System.in);
        int a,b,c,d,e,k, soma1, soma2, soma3,soma4,soma5, soma6,soma7,soma8, soma9, soma10;
        a=tc.nextInt();
                b=tc.nextInt();

                        c=tc.nextInt();

                                d=tc.nextInt();

                                        e=tc.nextInt();

                                              k  =tc.nextInt();

        if((a<b) && (b<c) && (c<d) && (d<e)){
            soma1= b-a;
            soma2= c-a;
            soma3= d-a;
            soma4= e-a;
            soma5=  c-b;
            soma6= d-b;
            soma7= e-b;
            soma8= d- c;
            soma9= e-c;
            soma10= e-d;
            if((soma1<=k) && (soma2<=k)&& (soma3<=k) && (soma4<=k) && (soma5<=k) && (soma6<=k) && (soma7<=k) && (soma8<=k) && (soma9<=k) && (soma10<=k) ){
                System.out.println("Yay!");
    }else{
                System.out.println(":(");
            }
        }
    } main {
        Scanner tc = new Scanner (System.in);
        int a,b,c,d,e,k, soma1, soma2, soma3,soma4,soma5, soma6,soma7,soma8, soma9, soma10;
        a=tc.nextInt();
                b=tc.nextInt();

                        c=tc.nextInt();

                                d=tc.nextInt();

                                        e=tc.nextInt();

                                              k  =tc.nextInt();

        if((a<b) && (b<c) && (c<d) && (d<e)){
            soma1= b-a;
            soma2= c-a;
            soma3= d-a;
            soma4= e-a;
            soma5=  c-b;
            soma6= d-b;
            soma7= e-b;
            soma8= d- c;
            soma9= e-c;
            soma10= e-d;
            if((soma1<=k) && (soma2<=k)&& (soma3<=k) && (soma4<=k) && (soma5<=k) && (soma6<=k) && (soma7<=k) && (soma8<=k) && (soma9<=k) && (soma10<=k) ){
                System.out.println("Yay!");
    }else{
                System.out.println(":(");
            }
        }
    } Scanner tc = new Scanner (System.in); tc new Scanner (System.in) int a a b b c c d d e e k k soma1 soma1 soma2 soma2 soma3 soma3 soma4 soma4 soma5 soma5 soma6 soma6 soma7 soma7 soma8 soma8 soma9 soma9 soma10; soma10 a=tc.nextInt() a tc.nextInt() tc.nextInt tc b=tc.nextInt() b tc.nextInt() tc.nextInt tc c=tc.nextInt() c tc.nextInt() tc.nextInt tc d=tc.nextInt() d tc.nextInt() tc.nextInt tc e=tc.nextInt() e tc.nextInt() tc.nextInt tc k  =tc.nextInt() k tc.nextInt() tc.nextInt tc if((a<b) && (b<c) && (c<d) && (d<e)){
            soma1= b-a;
            soma2= c-a;
            soma3= d-a;
            soma4= e-a;
            soma5=  c-b;
            soma6= d-b;
            soma7= e-b;
            soma8= d- c;
            soma9= e-c;
            soma10= e-d;
            if((soma1<=k) && (soma2<=k)&& (soma3<=k) && (soma4<=k) && (soma5<=k) && (soma6<=k) && (soma7<=k) && (soma8<=k) && (soma9<=k) && (soma10<=k) ){
                System.out.println("Yay!");
    }else{
                System.out.println(":(");
            }
        } (a<b) && (b<c) && (c<d) && (d<e) (c<d) (a<b) && (b<c) && (c<d) && (d<e) (a<b) a b (b<c) b c (c<d) c d (d<e) d e {
            soma1= b-a;
            soma2= c-a;
            soma3= d-a;
            soma4= e-a;
            soma5=  c-b;
            soma6= d-b;
            soma7= e-b;
            soma8= d- c;
            soma9= e-c;
            soma10= e-d;
            if((soma1<=k) && (soma2<=k)&& (soma3<=k) && (soma4<=k) && (soma5<=k) && (soma6<=k) && (soma7<=k) && (soma8<=k) && (soma9<=k) && (soma10<=k) ){
                System.out.println("Yay!");
    }else{
                System.out.println(":(");
            }
        } soma1= b-a soma1 b-a b a soma2= c-a soma2 c-a c a soma3= d-a soma3 d-a d a soma4= e-a soma4 e-a e a soma5=  c-b soma5 c-b c b soma6= d-b soma6 d-b d b soma7= e-b soma7 e-b e b soma8= d- c soma8 d- c d c soma9= e-c soma9 e-c e c soma10= e-d soma10 e-d e d if((soma1<=k) && (soma2<=k)&& (soma3<=k) && (soma4<=k) && (soma5<=k) && (soma6<=k) && (soma7<=k) && (soma8<=k) && (soma9<=k) && (soma10<=k) ){
                System.out.println("Yay!");
    }else{
                System.out.println(":(");
            } (soma1<=k) && (soma2<=k)&& (soma3<=k) && (soma4<=k) && (soma5<=k) && (soma6<=k) && (soma7<=k) && (soma8<=k) && (soma9<=k) && (soma10<=k) (soma9<=k) (soma8<=k) (soma7<=k) (soma6<=k) (soma5<=k) (soma4<=k) (soma3<=k) (soma1<=k) && (soma2<=k)&& (soma3<=k) && (soma4<=k) && (soma5<=k) && (soma6<=k) && (soma7<=k) && (soma8<=k) && (soma9<=k) && (soma10<=k) (soma1<=k) soma1 k (soma2<=k) soma2 k (soma3<=k) soma3 k (soma4<=k) soma4 k (soma5<=k) soma5 k (soma6<=k) soma6 k (soma7<=k) soma7 k (soma8<=k) soma8 k (soma9<=k) soma9 k (soma10<=k) soma10 k {
                System.out.println("Yay!");
    } System.out.println("Yay!") System.out.println System.out System System.out "Yay!" {
                System.out.println(":(");
            } System.out.println(":(") System.out.println System.out System System.out ":(" String[] args args public class Main {

    
    public static void main(String[] args) {
        Scanner tc = new Scanner (System.in);
        int a,b,c,d,e,k, soma1, soma2, soma3,soma4,soma5, soma6,soma7,soma8, soma9, soma10;
        a=tc.nextInt();
                b=tc.nextInt();

                        c=tc.nextInt();

                                d=tc.nextInt();

                                        e=tc.nextInt();

                                              k  =tc.nextInt();

        if((a<b) && (b<c) && (c<d) && (d<e)){
            soma1= b-a;
            soma2= c-a;
            soma3= d-a;
            soma4= e-a;
            soma5=  c-b;
            soma6= d-b;
            soma7= e-b;
            soma8= d- c;
            soma9= e-c;
            soma10= e-d;
            if((soma1<=k) && (soma2<=k)&& (soma3<=k) && (soma4<=k) && (soma5<=k) && (soma6<=k) && (soma7<=k) && (soma8<=k) && (soma9<=k) && (soma10<=k) ){
                System.out.println("Yay!");
    }else{
                System.out.println(":(");
            }
        }
    }
} public class Main {

    
    public static void main(String[] args) {
        Scanner tc = new Scanner (System.in);
        int a,b,c,d,e,k, soma1, soma2, soma3,soma4,soma5, soma6,soma7,soma8, soma9, soma10;
        a=tc.nextInt();
                b=tc.nextInt();

                        c=tc.nextInt();

                                d=tc.nextInt();

                                        e=tc.nextInt();

                                              k  =tc.nextInt();

        if((a<b) && (b<c) && (c<d) && (d<e)){
            soma1= b-a;
            soma2= c-a;
            soma3= d-a;
            soma4= e-a;
            soma5=  c-b;
            soma6= d-b;
            soma7= e-b;
            soma8= d- c;
            soma9= e-c;
            soma10= e-d;
            if((soma1<=k) && (soma2<=k)&& (soma3<=k) && (soma4<=k) && (soma5<=k) && (soma6<=k) && (soma7<=k) && (soma8<=k) && (soma9<=k) && (soma10<=k) ){
                System.out.println("Yay!");
    }else{
                System.out.println(":(");
            }
        }
    }
} Main
import java.util.Scanner;

public class Main {

    
    public static void main(String[] args) {
        Scanner tc = new Scanner (System.in);
        int a,b,c,d,e,k, soma1, soma2, soma3,soma4,soma5, soma6,soma7,soma8, soma9, soma10;
        a=tc.nextInt();
                b=tc.nextInt();

                        c=tc.nextInt();

                                d=tc.nextInt();

                                        e=tc.nextInt();

                                              k  =tc.nextInt();

        if((a<b) && (b<c) && (c<d) && (d<e)){
            soma1= b-a;
            soma2= c-a;
            soma3= d-a;
            soma4= e-a;
            soma5=  c-b;
            soma6= d-b;
            soma7= e-b;
            soma8= d- c;
            soma9= e-c;
            soma10= e-d;
            if((soma1<=k) && (soma2<=k)&& (soma3<=k) && (soma4<=k) && (soma5<=k) && (soma6<=k) && (soma7<=k) && (soma8<=k) && (soma9<=k) && (soma10<=k) ){
                System.out.println("Yay!");
    }else{
                System.out.println(":(");
            }
        }
    }
}
