var arr = input.split("\n");
    var newarr= arr.slice(1);
    for (k=0;k<newarr.length;k++){
    var str=newarr[k];
    var mid=Math.floor(str.length/2);
    var count=0;
    var diff=0;
    var j= str.length-1;
    for (let i=0;i<mid;i++){
        diff=Math.abs(str.charCodeAt(j)-str.charCodeAt(i));
            count+=diff;
            j--;
    }
    
    console.log(count);
    
    }