import java.util.Scanner;
import java.util.Arrays;
class abcofABC{
  public static void main(String args[]){
      char foo[]=new char[3];
      String S;
     Scanner sc=new Scanner(System.in);

     int i;
     System.out.print("S:");
     S=sc.next();

    for(i=0;i<=2;i++){
      foo[i]=S.charAt(i);
    }
    Arrays.sort(foo);


    if((foo[0]=='a') && (foo[1]=='b') && (foo[2]=='c')){
      System.out.println("yes");
    }else{
      System.out.println("no");
    }

  }
}