#include <stdio.h>
int check_7(int n){
  if(n < 0){
    n *=-1;
  }
  while(n > 0){
    if(n % 10 == 7){
      return 1;
    }
    n /= 10;
  }
  return 0;
}
int main(){
  int n;
  scanf("%d",&n);
  int a = n,b = 0;
  while(check_7(a) == 1  || check_7(b) == 1){
    a--;
    b++;
  }
  printf("%d %d\n",a,b);
  return 0;
}