// A program that turns the EGN to a date (DD.MM.YY)
#include <iostream>
#include <cmath>
using namespace std;
int main() {
int egn, d, m, y;
cin >> egn;
printf("%d.", (egn/1000000));
printf("%d.", (egn/10000)%100);
printf("%d", egn%10000);
return 0;
}
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