// editor5#include <stdio.h>
#include <stdlib.h>
int main() {
    int n, oldVal, newVal,found=0;
    if (scanf("%d", &n) != 1 || n < 0 || n > 1000) {
        printf("Invalid input\n");
        return 0;
    }
    int arr[n];
    for(int 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(int i=0;i<n;i++){
            if(arr[i]==oldVal){
                arr[i]=newVal;
                found++;
            }
        }
        if(!found){
            printf("Value not found");
            return 0;
        }
        for(int i=0;i<n;i++){
            printf("%d ",arr[i]);
        }
        return 0;
}