#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <time.h>
#define LINE_SIZE 150

int main() {
    char znaky[LINE_SIZE];
    memset(znaky, 0, LINE_SIZE);
    char* r = NULL;
    int dd = 0;
    int mm = 0;
    int yyyy = 0;
    char buffer [LINE_SIZE];
    char *koniec_cisla = NULL;
    char* zaciatok_cisla = znaky;
    int cislo = 0;
    int counter = 0;
    int che = 0;
    int count = 0;
    int toc = 0;
    while ((r = fgets(znaky, LINE_SIZE, stdin)) != NULL) {
        if (feof(stdin)) {
            break;
        }
	if(znaky[0] == '\n'){
	break;
	}
       for(int i = 0; i < 10; i++){
       if(znaky[i] == '.'){
       toc++;
       }
       }
	//printf("-->%d\n", toc);       
       if(toc != 2){
       che = 1;
       }
       toc = 0;
	zaciatok_cisla = znaky;
        counter = 0;
        while (*zaciatok_cisla != '\0') {
            cislo = strtol(zaciatok_cisla, &koniec_cisla, 10);
            if (zaciatok_cisla == koniec_cisla) {
                break;
            } else {
                if (counter == 0) {
                    dd = cislo;
		    	if(dd <= 0){
		    		che = 1;
		    	}
                } else if (counter == 1) {
		    mm = cislo;
			if(mm <= 0){
		    		che = 1;
		    	}
                } else if (counter == 2) {
                    yyyy = cislo;
			if(yyyy <= 0){
		    		che = 1;
		    	}
			if(yyyy < 1900 || yyyy > 2100){
			che = 1;
			}
			if(yyyy % 100 != 0 && yyyy % 4 == 0){
				count++;
			}
			if(yyyy % 400 == 0){
				count++;
			}
                }
                counter++;
                zaciatok_cisla = koniec_cisla + 1;
            }
        }
	if(count == 0 && mm == 2 && dd == 29){
	//printf("--->>>%d\n", count);
	che = 1;
	}
	if(counter != 3 || che == 1){
	printf("Neplatny datum.\n");
	che = 1;
	}
        //printf("%d %d %d\n", dd, mm, yyyy);
        time_t t = time(NULL);
        struct tm *tm_date = localtime(&t);
        tm_date->tm_mday = dd + 7;
        tm_date->tm_mon = mm - 1;
        tm_date->tm_year = yyyy - 1900;
        //printf("%d %d %d\n", tm_date->tm_mday, tm_date->tm_mon, tm_date->tm_year);
        time_t daja = mktime(tm_date);
        //printf("%ld", daja);
        struct tm *tm_churka = localtime(&daja);

        strftime(buffer, LINE_SIZE, "%e.%m.%Y", tm_churka);
        for(int i = 0; i < LINE_SIZE; i++){
            if(buffer[i] == ' '){
                buffer[i] = '&';
            }
        }
	if(buffer[0] == 0){
	buffer[0] = '&';
	}
	if(buffer[3] == 48){
	buffer[3] = '&';
	}
	if(che == 0){
	for(int i = 0; i < 10; i++){
	if(buffer[i] != '&'){
	printf("%c", buffer[i]);
	che = 0;
	}
	}
	printf("\n\n");
	}
	else{
	che = 0;
	}
	}
    return 0;
}