#include<stdio.h>
int main(){
    int n,found=0,x,i;
    scanf("%d",&n);
    int mar[n];
    for(i=0;i<n;i++){
        scanf("%d",&mar[i]);
        
    }
    scanf("%d",&x);
    for(i=0;i<n;i++){
        if(mar[i]==x){
            found =1;
            break;
        }
    }
    if(found){
        for(int j=i;j<n-1;j++){
            marbles[j]=marbles[j+1];
        }
        n--;
        for(i=0;i<n;i++){
            printf("%d",marbles[i]);
        }
    }else{
        printf("Marble not found");
    }
    return 0;
}