#include <stdio.h>

int main() {
    int num, a, b, c, temp;
    scanf("%d", &num);
    a = num / 100;
    b = (num / 10) % 10;
    c = num % 10;
    if (a < b) {
        temp = a;
        a = b;
        b = temp;
    }
    if (a < c) {
        temp = a;
        a = c;
        c = temp;
    }
    if (b < c) {
        temp = b;
        b = c;
        c = temp;
    }
    printf("%d\n", a * 100 + b * 10 + c);
    return 0;
}
/**************************************************************
	Problem: 1042
	User: fuhoubin
	Language: C++
	Result: Accepted
	Time:8 ms
	Memory:1144 kb
****************************************************************/