#include<stdio.h>
#include<stdlib.h>
#include<string.h>


int compare (const void *a, const void *b){

        char **a1=(char**)a;
        char **b1=(char**)b;
        return strcmp(*a1,*b1);

}


int main(){

    int n,i,j,occ,stop;
    char* temp;
    char** a;
    char** b;
    char p[101];
    scanf("%d",&n);
    a=(char**)malloc(n*sizeof(char*));
    for(i=0;i<n;i++)
        a[i]=NULL;
    occ=0;
    for(i=0;i<n;i++){
        scanf("%s",p);
        j=0;
        stop=0;
        while(a[j]!=NULL&&!stop){
            if(strcmp(a[j],p)!=0)   j++;
                else stop=1;
        }
        if(!stop){
            a[j]=(char*)malloc(101*sizeof(char));
            strcpy(a[j],p);
            occ++;
        }
    }
    b=(char**)malloc(occ*sizeof(char*));
    for(i=0;i<occ;i++)
        strcpy(b[i],a[i]);
    qsort(b,occ,sizeof(char*),compare);
    for(i=0;i<occ;i++){
        temp=(char*)malloc(101*sizeof(char));
        strcpy(temp,b[i]);
        j=strlen(temp);
        if(j>1){
            if(temp[j-1]=='o'){
                if(temp[j-2]=='t')
                    printf("%s",temp);
            }
        }
    }
    return 0;
}