// editor2
#include<stdio.h>
#include<string.h>
int main(){
    int n;
    char sentence[100];
    char stack[50][20];
    int top=-1;
    scanf("%d",&n);
    if(n<0){
        printf("Invalid input");
        return 0;
    }
    scanf("%[^\n]",sentence);
    char *token=strtok(sentence," ");
    while(token!=NULL){
        top++;
        strcpy(stack[top],token);
        token=strtok(NULL);
    }
      }
    return 0;
}