#include <iostream>
#include <cstring>
#include <string>
#include <cstddef>
#include <iomanip>

using namespace std;

int main()
{

    char src[256];
    int lengthOfWords = 0;
    char **words = NULL;
    gets(src);


    char *currWord = strtok(src, " ");


    while(currWord != NULL) {
        words = (char**) realloc(words, (lengthOfWords + 1) * sizeof(char*));

        int lengthOfCurrWord = strlen(currWord);
        words[lengthOfWords] = (char*)malloc(lengthOfCurrWord * sizeof(char));
        words[lengthOfWords] = currWord;
        lengthOfWords++;
        if (currWord != NULL) {
            currWord = strtok(NULL, " ");
        }
    }

    char result[256];

    for(int i = 0; i < lengthOfWords; i++) {
        int counterUniqueChars = 0;
        bool seen[26];

        for(int i = 0; i < 26; i++) seen[i] = false;

        int lengthOfCurrWord = strlen(words[i]);
        for(int j = 0; j < lengthOfCurrWord; j++) {
            const int symbol = (int) words[i][j];

            int indexOfChar = (symbol % 124) - 97;
            if(seen[indexOfChar] == false) {
                seen[indexOfChar] = true;
                counterUniqueChars++;
            }
        }

        if(counterUniqueChars > 2) {
            strcat(result, words[i]);
            strcat(result, " ");
        }
    }

    cout << "Result stinfg is: ";
    cout << result;

    return 0;
}