#include <stdlib.h>
#include <stdio.h>
#include <ctype.h>
#include <math.h>
#include <string.h>
#define EPS 1e-8
#define pi 3.1415926535897932384626433832795028841971693993751
#define N 2147483647
/*freopen("sample.txt", "r", stdin);*/

#define NUMBER_STRINGS    50010  /* Number of strings                                           */
#define STRING_SIZE       500   /* Size of string                                              */
#define START_SUBSTRING   0    /* Start of of subscript in string to compare                  */
#define LENGTH_SUBSTRING  dd  /* Length of substring to compare (size of largest string)     */

static int str_start, len;
char str2[NUMBER_STRINGS][STRING_SIZE];
char str[NUMBER_STRINGS][STRING_SIZE];

static int cmp( const void *, const void * );
void sort_str( void *s, int num_elements, int str_size, int start, int length );

static int cmp( const void *a, const void *b )
{
    return strncmp( ( ( char * ) a ) + str_start,
                         ( ( char * ) b ) + str_start, len );
}

void sort_str( void *s, int num_elements, int str_size, int start, int length )
{
    str_start = start;
    len = length;
    qsort( s, num_elements, str_size, cmp );
}

int main()
{
    int i, j, l, len2, dd, ff, z, n, k;
    dd = 0, i = 0;
    /*freopen("sample.txt", "r", stdin);*/
    for (i = 0; ;i++)
    {
        gets(str[i]);
        if (feof(stdin)) break;

    }

    l = 0, n = i;
    for (k = 0; k < n; k++)
    {
        if (str[k][0] == '\0') continue;
        for (j = 0; str[k][j] != '\0'; j++)
        {
            if (isalpha(str[k][j]) || (str[k][j] == '-' && str[k][j + 1] != '\0'))
            {
                if (isupper(str[k][j])) str[k][j] = tolower(str[k][j]);
                str2[i][l] = str[k][j];
                l++;
            }
            else
            {
                if (str[k][j] == '-' && str[k + 1][0] != '\0' && str[k][j + 1] == '\0') {}
                else
                {
                    str2[i][l] = '\0';
                    len2 = strlen(str2[i]);
                    if (len2 > dd) dd = len2;
                    i++;
                    l = 0;
                }
            }
        }
        if (str[k][j - 1] == '-' && str[k + 1][0] != '\0') {}
        else
        {
            str2[i][l] = '\0';
            len2 = strlen(str2[i]);
            if (len2 > dd) dd = len2;
            i++;
            l = 0;
        }
    }

    ff = i;
    sort_str (str2, ff, STRING_SIZE, START_SUBSTRING, LENGTH_SUBSTRING);
    z = 0;
    for (j = 0; j < i; j++)
    {
        if (str2[j][0] == '\0') continue;
        if (j != 0)
        {
            z = strcmp(str2[j - 1], str2[j]);
        }
        if (z != 0) printf("%s\n", str2[j]);
    }
    return 0;
}