#include<stdio.h>
#include<stdlib.h>
#include<ctype.h>
#include<string.h>
int main(){
    int n,oldval,newval,i,found=0;
    if(scanf("%d",&n)!=1||n<0||n>1000){
        printf("Invalid input");
        return 0;
    }
    int arr[n];
   
    for(i=0;i<n;i++){
        if(scanf("%d",&arr[i])!=1){
            printf("Invalid input");
            return 0;
            }
    }
   
    if(scanf("%d %d",&oldval,&newval)!=2){
        printf("Invalid input");
        return 0;
    }
   
    for(i=0;i<n;i++){
        if(arr[i]==oldval){
            arr[i]=newval;
            found=1;
        }
 
    }
   
    if(!found){
        printf("Value not found");
        return 0;
    }
    else{
        for(i=0;i<n;i++){
            printf("%d ",arr[i]);
        }
        printf("\n");
    }
    return 0;
}
}