import java.util.*;
public class Main
{
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
int inpu1 = sc.nextInt(),inpu2=sc.nextInt(),inpu3=sc.nextInt();
String s1 = inpu1+"";
String s2 = inpu2+"";
String s3 = inpu3+"";
int thouMax = Math.max(Integer.parseInt(s1.charAt(0)+""),Math.max(Integer.parseInt(s2.charAt(0)+""),Integer.parseInt(s3.charAt(0)+"")));
int thouMin = Math.min(Integer.parseInt(s1.charAt(0)+""),Math.min(Integer.parseInt(s2.charAt(0)+""),Integer.parseInt(s3.charAt(0)+"")));
int HunMax = Math.max(Integer.parseInt(s1.charAt(1)+""),Math.max(Integer.parseInt(s2.charAt(1)+""),Integer.parseInt(s3.charAt(1)+"")));
int HunMin = Math.min(Integer.parseInt(s1.charAt(1)+""),Math.min(Integer.parseInt(s2.charAt(1)+""),Integer.parseInt(s3.charAt(1)+"")));
int tenMax = Math.max(Integer.parseInt(s1.charAt(2)+""),Math.max(Integer.parseInt(s2.charAt(2)+""),Integer.parseInt(s3.charAt(2)+"")));
int tenMin = Math.min(Integer.parseInt(s1.charAt(2)+""),Math.min(Integer.parseInt(s2.charAt(2)+""),Integer.parseInt(s3.charAt(2)+"")));
int oneMax = Math.max(Integer.parseInt(s1.charAt(3)+""),Math.max(Integer.parseInt(s2.charAt(3)+""),Integer.parseInt(s3.charAt(3)+"")));
int oneMin = Math.min(Integer.parseInt(s1.charAt(3)+""),Math.min(Integer.parseInt(s2.charAt(3)+""),Integer.parseInt(s3.charAt(3)+"")));
System.out.println((thouMax-thouMin)+""+(HunMax-HunMin)+""+(tenMax-tenMin)+""+(oneMax-oneMin));
}
}
{"html5":"htmlmixed","css":"css","javascript":"javascript","php":"php","python":"python","ruby":"ruby","lua":"text\/x-lua","bash":"text\/x-sh","go":"go","c":"text\/x-csrc","cpp":"text\/x-c++src","diff":"diff","latex":"stex","sql":"sql","xml":"xml","apl":"apl","asterisk":"asterisk","c_loadrunner":"text\/x-csrc","c_mac":"text\/x-csrc","coffeescript":"text\/x-coffeescript","csharp":"text\/x-csharp","d":"d","ecmascript":"javascript","erlang":"erlang","groovy":"text\/x-groovy","haskell":"text\/x-haskell","haxe":"text\/x-haxe","html4strict":"htmlmixed","java":"text\/x-java","java5":"text\/x-java","jquery":"javascript","mirc":"mirc","mysql":"sql","ocaml":"text\/x-ocaml","pascal":"text\/x-pascal","perl":"perl","perl6":"perl","plsql":"sql","properties":"text\/x-properties","q":"text\/x-q","scala":"scala","scheme":"text\/x-scheme","tcl":"text\/x-tcl","vb":"text\/x-vb","verilog":"text\/x-verilog","yaml":"text\/x-yaml","z80":"text\/x-z80"}