#include<cstdio>
#include<algorithm>
using namespace std;
int main(){
	int n;
	scanf("%d",&n);
	while(n--){
		int a[10] = {0};
		char str[10];
		scanf("%s",str);
		for(int i = 0; i < 8; i++){
			a[i] = str[i] - '0';
		}
		sort(a,a+8);
		char x[9] = {0},y[9] = {0};
		for(int i = 0; i < 8; i++){
			x[i] = a[i] + '0';
			y[i] = a[8-1-i] + '0';
		}
		int min,max;
		sscanf(x,"%d",&min);
		sscanf(y,"%d",&max);
		printf("%d\n",max-min);
	}
	return 0;
}