#include<stdio.h>
#include<stdlib.h>
#include<string.h>
#include<math.h>
void main(){
	int i,j,k,n,c=0;
	printf("enter no of queries.....");
	scanf("%d",&n);
	int a[n];
	for(k=0;k<n;k++){
		char *s;
		s=(char*)malloc(10000*sizeof(char));
	//	printf("enter string....");
		scanf("%s",s);
		i=0;j=strlen(s)-1;c=0;
		while(i<j){
			c+=abs(s[i]-s[j]);
			i++;
			j--;
		}
		a[k]=c;
	}
	for(i=0;i<n;i++){
		if(i==n-1)
		printf("%d",a[i]);
		else
		printf("%d\n",a[i]);
	}

}