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

int main(){
  char riadok[499][499];
  int i, o , need = 0;
  bool first;
  while (1){
    o = 0;
    while (1){
      riadok[i][o] = getchar();
      if (riadok[i][o] == '\n'){
        first = true;
        need++;
        break;
      }
      o++;
    }
    if (first == true && riadok[i][0] == '\n'){
      break;
    }
    i++;
  }
  for (int j = 0; j < need - 1; j++){
    for (int g = 0; g < strlen(riadok[j]); g++){
      if (riadok[j][g] != '.' && riadok[j][g] != '1' && riadok[j][g] != '2' && riadok[j][g] != '3' && riadok[j][g] != '4' && riadok[j][g] != '5' && riadok[j][g] != '6' && riadok[j][g] != '7' && riadok[j][g] != '8' && riadok[j][g] != '9' && riadok[j][g] != '0' && riadok[j][g] != '\n' && riadok[j][g] != '\0'){
        riadok[j][0] = '9';
        riadok[j][1] = '.';
        riadok[j][2] = '9';
        riadok[j][3] = '.';
        riadok[j][4] = '9';
        riadok[j][5] = '.';
        riadok[j][6] = '\0';
        break;
      }
    }
  }
  i = 0;
  for (int j = 0; j < need - 1; j++){
    i = 1;
    for (int g = 0; g < strlen(riadok[j]); g++){
      if ((riadok[j][g] == '1'  riadok[j][g] == '2'  riadok[j][g] == '3'  riadok[j][g] == '4'  riadok[j][g] == '5'  riadok[j][g] == '6'  riadok[j][g] == '7'  riadok[j][g] == '8'  riadok[j][g] == '9'  riadok[j][g] == '0'  riadok[j][g] == '\0')){
        i++;
        if (strlen(riadok[j]) == i){
          riadok[j][0] = '9';
          riadok[j][1] = '.';
          riadok[j][2] = '9';
          riadok[j][3] = '.';
          riadok[j][4] = '9';
          riadok[j][5] = '.';
          riadok[j][6] = '\0';
          break;
        }
      }
    }
  }
  for (int j = 0; j < need - 1; j++){
    if (riadok[j][0] == '0'){
      riadok[j][0] = '9';
      riadok[j][1] = '.';
      riadok[j][2] = '9';
      riadok[j][3] = '.';
      riadok[j][4] = '9';
      riadok[j][5] = '.';
      riadok[j][6] = '\0';
    }
  }
  for (int j = 0; j < need - 1; j++){
    for (int g = 0; g < strlen(riadok[j]); g++){
      if (riadok[j][g] == '0' && riadok[j][g - 1] == '.'){
        riadok[j][0] = '9';
        riadok[j][1] = '.';
        riadok[j][2] = '9';
        riadok[j][3] = '.';
        riadok[j][4] = '9';
        riadok[j][5] = '.';
        riadok[j][6] = '\0';
      }
    }
  }
  char riadok1[499];
  i = 0;
  for (int j = 0; j < need - 1; j++){
    for (int g = 0; g < strlen(riadok[j]); g++){
      if (riadok[j][g] == '\n'){
        riadok[j][g] = '.';
      }
      if (riadok[j][g] != '\0'){
        riadok1[i] = riadok[j][g];
        i++;
      }
    }
  }
  riadok1[i] = '\0';
  int len = strlen(riadok1);
  int s = 0;
  for (int j = 0; j < len; j++){
    if (riadok1[j] == '.'){
      s++;
    }
  }
  char *endptr = NULL;
  char *start = riadok1;
  int number[s];
  i = 0;
  while (start < (riadok1 + len)){
    number[i] = strtol(start, &endptr, 10);
    if (number[i])
      start = endptr + 1;
    else
      break;
    i++;
  }
  need = 0;
  for (int j = 0; j < s; j = j + 3){
    if (number[j + 1] > 12  number[j + 1] < 0  number[j] < 1  number[j] > 31  number[j + 2] < 1900  number[j + 2] > 2100){
      number[j] = 0;
      number[j + 1] = 0;
      number[j + 2] = 0;
      need++;
    }
  }
  for (int j = 0; j < s; j = j + 3){
    if (number[j + 1] == 2 && number[j] == 29 && number[j + 2] % 4 != 0) {
      number[j] = 0;
      number[j + 1] = 0;
      number[j + 2] = 0;
      need++;
    }
  }
  for (int j = 0; j < s; j = j + 3){
    if (number[j + 1] == 1 && number[j] > 0 && number[j] <= 31){
      if (number[j] <= 24)
        number[j] = number[j] + 7;
      else if (number[j] > 24){
        number[j] = number[j] + 7 - 31;
        number[j + 1]++;
      }
    }
    else if (number[j + 1] == 2 && number[j] > 0 && number[j] <= 28 && number[j + 2] % 4 != 0){
      if (number[j] <= 21){
        number[j] = number[j] + 7;
      }
      else if (number[j] > 21){
        number[j] = number[j] + 7 - 28;
        number[j + 1]++;
      }
    }
    else if (number[j + 1] == 2 && number[j] > 0 && number[j] <= 29 && number[j + 2] % 4 == 0){
      if (number[j] <= 22){
        number[j] = number[j] + 7;
      }
      else if (number[j] > 22){
        number[j] = number[j] + 7 - 29;
        number[j + 1]++;
      }
    }
    else if (number[j + 1] == 3 && number[j] > 0 && number[j] <= 31){
      if (number[j] <= 24){
        number[j] = number[j] + 7;
      }
      else if (number[j] > 24){
        number[j] = number[j] + 7 - 31;
        number[j + 1]++;
      }
    }
    else if (number[j + 1] == 4 && number[j] > 0 && number[j] <= 30){
      if (number[j] <= 23){
        number[j] = number[j] + 7;
      }
      else if (number[j] > 23){
        number[j] = number[j] + 7 - 30;
        number[j + 1]++;
      }
    }
    else if (number[j + 1] == 5 && number[j] > 0 && number[j] <= 31){
      if (number[j] <= 24){
        number[j] = number[j] + 7;
      }
      else if (number[j] > 24){
        number[j] = number[j] + 7 - 31;
        number[j + 1]++;
      }
    }
    else if (number[j + 1] == 6 && number[j] > 0 && number[j] <= 30){
      if (number[j] <= 23){
        number[j] = number[j] + 7;
      }
      else if (number[j] > 23){
        number[j] = number[j] + 7 - 30;
        number[j + 1]++;
      }
    }
    else if (number[j + 1] == 7 && number[j] > 0 && number[j] <= 31){
      if (number[j] <= 24){
        number[j] = number[j] + 7;
      }
      else if (number[j] > 24){

        number[j] = number[j] + 7 - 31;
        number[j + 1]++;
      }
    }
    else if (number[j + 1] == 8 && number[j] > 0 && number[j] <= 31){
      if (number[j] <= 24){
        number[j] = number[j] + 7;
      }
      else if (number[j] > 24){
        number[j] = number[j] + 7 - 31;
        number[j + 1]++;
      }
    }
    else if (number[j + 1] == 9 && number[j] > 0 && number[j] <= 30){
      if (number[j] <= 23){
        number[j] = number[j] + 7;
      }
      else if (number[j] > 23){
        number[j] = number[j] + 7 - 30;
        number[j + 1]++;
      }
    }
    else if (number[j + 1] == 10 && number[j] > 0 && number[j] <= 31){
      if (number[j] <= 24){
        number[j] = number[j] + 7;
      }
      else if (number[j] > 24){
        number[j] = number[j] + 7 - 31;
        number[j + 1]++;
      }
    }
    else if (number[j + 1] == 11 && number[j] > 0 && number[j] <= 30){
      if (number[j] <= 23){
        number[j] = number[j] + 7;
      }
      else if (number[j] > 23){
        number[j] = number[j] + 7 - 30;
        number[j + 1]++;
      }
    }
    else if (number[j + 1] == 12 && number[j] > 0 && number[j] <= 31){
      if (number[j] <= 24){
        number[j] = number[j] + 7;
      }
      else if (number[j] > 24){
        number[j] = number[j] + 7 - 31;
        number[j + 1] = 1;
        number[j + 2]++;
      }
    }
    if (number[j] != 0 && number[j + 1] != 0 && number[j + 2] != 0){
      printf("%d.%d.%d\n\n", number[j], number[j + 1], number[j + 2]);
    }
    else if (number[j] == 0 && number[j + 1] == 0 && number[j + 2] == 0){
      puts("Neplatny datum.");
    }
  }
}