#include<string.h>
#include<stdio.h>
int main()
{
    int m,a,c,b;
    scanf("%d",&m);
    a=m/100;
    b=m/10%10;
    c=m%10;
    if(a>b&&b>c)
        printf("%d",a-c);
    if(a>c&&c>b)
        printf("%d",a-b);
    if(c>b&&b>a)
        printf("%d",c-a);
    if(c>a&&a>b)
        printf("%d",c-b);
    if(b>a&&a>c)
        printf("%d",b-c);
    if(b>c&&c>a)
        printf("%d",b-a);
    return 0;
}

/**************************************************************
	Problem: 1667
	User: admin
	Language: C
	Result: Accepted
	Time:14 ms
	Memory:1144 kb
****************************************************************/