#include<stdio.h>
#include<stdlib.h>
#include<string.h>
#include<ctype.h>
struct node{
    char data[100];
    struct node*next;
};
int main(){
    int n,i;
    struct node *start=NULL;
    struct node *temp=NULL;
    struct node *current=NULL;
    
    scanf("%d",&n);
    
    start=(struct node*)malloc(sizeof(struct node));
    scanf("%s",start->data);
    start->next=NULL;
    current=start;
    
    for(i=2;i<=n;i++){
        temp=(struct node*)malloc(sizeof(struct node));
        scanf("%s",temp->data);
        temp->next=NULL;
        current->next=temp;
        current=temp;
    }
    current=start;
    while(current!=NULL){
        for(i=0;current->data[i]!='\0';i++)
        {
            if(!isalum(current->data[i])){
                printf("Invalid inpur");;
                return 0;
            }
        }
        current=current->next;
    }
    current=start;
    while(current!=NULL){
        printf(" %s",current->data);
        current=current->next;
    }
    return 0;
}