import java.util.*;
class Main {
  public static void main(String[] args) {
    Scanner sc = new Scanner(System.in);
    for (int i = 1; i <=5; i++) {
      if (sc.nextInt() == 0) System.out.println(i); 
    }
  }
} import java.util.*; util.* java class Main {
  public static void main(String[] args) {
    Scanner sc = new Scanner(System.in);
    for (int i = 1; i <=5; i++) {
      if (sc.nextInt() == 0) System.out.println(i); 
    }
  }
} Main public static void main(String[] args) {
    Scanner sc = new Scanner(System.in);
    for (int i = 1; i <=5; i++) {
      if (sc.nextInt() == 0) System.out.println(i); 
    }
  } main {
    Scanner sc = new Scanner(System.in);
    for (int i = 1; i <=5; i++) {
      if (sc.nextInt() == 0) System.out.println(i); 
    }
  } Scanner sc = new Scanner(System.in); sc new Scanner(System.in) for (int i = 1; i <=5; i++) {
      if (sc.nextInt() == 0) System.out.println(i); 
    } int i = 1; int i = 1; i 1 i <=5 i 5 i++ i++ i {
      if (sc.nextInt() == 0) System.out.println(i); 
    } {
      if (sc.nextInt() == 0) System.out.println(i); 
    } if (sc.nextInt() == 0) System.out.println(i); sc.nextInt() == 0 sc.nextInt() sc.nextInt sc 0 System.out.println(i) System.out.println System.out System System.out i String[] args args
import java.util.*;
class Main {
  public static void main(String[] args) {
    Scanner sc = new Scanner(System.in);
    for (int i = 1; i <=5; i++) {
      if (sc.nextInt() == 0) System.out.println(i); 
    }
  }
}