#include<stdio.h>
#include<string.h>
#include<ctype.h>
#define MAX_NAME_LENGTH 100
int main(){
    int n;
    scanf("%d",&n);
    char  names[n][MAX_NAME_LENGTH];
    char tail[MAX_NAME_LENGTH];
    
    for(int i=0;i<n;i++){
        scanf("%s",tail);
        for(int j=0;tail[j]!='\0';j++){
            if(isalpha(tail[j])){
                printf("Invalid input\n");
                return 0;
            }
        }
        
        strcpy(names[i],tail);
    }
    for(int i=0;i<n;i++){
        printf("%s",names[i]);
        if(i != n-1){
            print(" ");
        }
    }
    printf("\n");
    return 0;
}