#include <stdio.h>
#include <ctype.h>
int main(){
    int n,x;
    int values[100];
    int count = 0;
    if(scanf("%d %d",&n,&x) !=2){
        printf("Invalid input");
        return 0;
    }
    if(n <=0 || n > 20){
        printf("Invalid input");
        return 0;
    }
    for(int i = 0; i < n; i++){
        if(scanf("%d", &values[i] != 1)){
            printf("Invalid input");
            return 0;
            
        }
        if(values[i] < 0 || values[i]>1000){
        printf("Invalid input");
        return 0;
        }
    count++;
}

   if(count != n){
    printf("Invalid input");
    return 0;
}
   int printed = 0;
   for(int i =0; i < n; i++){
    if (printed)
    printf(" ");
    printf("%d",values[i]);
    
    printed = 1;
}
    
if (!printed){
    printf("Invalid input");
   printf("Invalid input");
   
   printf("\n");
   return 0;    
}

}