#include <stdio.h>
#include <stdlib.h>
#include <string.h>
int lexicographic_sort(const char* a, const char* b) {
    return strcmp(a, b);
}

int lexicographic_sort_reverse(const char* a, const char* b) {
    return strcmp(b, a);
}

int sort_by_number_of_distinct_characters(const char* a, const char* b) {
    int countA[26] = {0};
    int distinctA = 0;
    for(int i = 0; a[i] != '\0'; i++){
        if(countA[a[i] - 'a'] == 0){
            distinctA++;
            countA[a[i] - 'a'] = 1;                        
        }
    }
    int countB[26] = {0};
    int distinctB = 0;
    for(int i = 0; b[i] != '\0'; i++){
        if(countB[b[i] - 'a'] == 0){
            distinctB++;
            countB[b[i] - 'a'] = 1;                        
        }
    }
    if(distinctA != distinctB){
        return (distinctA - distinctB);
    }
    else{
        return strcmp(a, b);        
    }        
}

int sort_by_length(const char* a, const char* b) {
    int lengthA = strlen(a);
    int lengthB = strlen(b);
    if(lengthA != lengthB){
        return (lengthA - lengthB);
    }
    else{
        return strcmp(a, b);        
    }    
}

void string_sort(char** arr,const int len,int (*cmp_func)(const char* a, const char* b)){
    for(int i = 0; i < len - 1; i++){
        for(int j = 0; j < len - 1 - i; j++){
            if(cmp_func(arr[j], arr[j + 1]) > 0){
                char* temp = arr[j];
                arr[j] = arr[j + 1];
                arr[j + 1] = temp;
            }
        }
    }
}


int main() 
{
    int n;
    scanf("%d", &n);
  
    char** arr;
	arr = (char**)malloc(n * sizeof(char*));
  
    for(int i = 0; i < n; i++){
        *(arr + i) = malloc(1024 * sizeof(char));
        scanf("%s", *(arr + i));
        *(arr + i) = realloc(*(arr + i), strlen(*(arr + i)) + 1);
    }
  
    string_sort(arr, n, lexicographic_sort);
    for(int i = 0; i < n; i++)
        printf("%s\n", arr[i]);
    printf("\n");

    string_sort(arr, n, lexicographic_sort_reverse);
    for(int i = 0; i < n; i++)
        printf("%s\n", arr[i]); 
    printf("\n");

    string_sort(arr, n, sort_by_length);
    for(int i = 0; i < n; i++)
        printf("%s\n", arr[i]);    
    printf("\n");

    string_sort(arr, n, sort_by_number_of_distinct_characters);
    for(int i = 0; i < n; i++)
        printf("%s\n", arr[i]); 
    printf("\n");
}