#include <assert.h>
#include <ctype.h>
#include <limits.h>
#include <math.h>
#include <stdbool.h>
#include <stddef.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>

char* readline();
char* ltrim(char*);
char* rtrim(char*);

int parse_int(char*);

/*
 * Complete the 'solve' function below.
 *
 * The function is expected to return a DOUBLE.
 * The function accepts STRING s as parameter.
 */
bool is_palindrome(const char* s){
    int n=strlen(s);
    for(int i=0;i<n/2;++i) {
        if(s[i]!=s[n-i-1]) {
            return false;
        }
    }
    return true;
}



int min_swaps_to_palindrome(char* s){
    int n=strlen(s);
    int swaps=0;
    
    for(int i=0;i<n/2;++i) {
        int left = i;
        int right = n-left-1;
        
        while(left<right && s[left] != s[right]){
            right--;
            }
        if (left==right) {
            if(n % 2== 1) {
        for (int j=right;j<n-left-1;++j) {
            char temp = s[j];
            s[j]=s[j+1];
            s[j+1]=temp;
            swaps++;
        } continue;
            } else {
                    return -1;
                }
            } else {
                    for (int j=right;j<n-left-1;++j) {
                        char temp =s[j];
                        s[j]=s[j+1];
                        s[j+1]=temp;
                        swaps++;
                    }
                }
    } 
    return swaps;

}




double solve(char* s) {
    if(is_palindrome(s)) {
        return 0.0;
    }
    int min_swaps=min_swaps_to_palindrome(s);
    if(min_swaps == -1) {
        return (double)INT_MAX;
    }
    return(double)min_swaps;
    }
    
int main()
{
    FILE* fptr = fopen(getenv("OUTPUT_PATH"), "w");

    int t = parse_int(ltrim(rtrim(readline())));

    for (int t_itr = 0; t_itr < t; t_itr++) {
        char* s = readline();

        double result = solve(s);

        fprintf(fptr, "%lf\n", result);
    }

    fclose(fptr);

    return 0;
}

char* readline() {
    size_t alloc_length = 1024;
    size_t data_length = 0;

    char* data = malloc(alloc_length);

    while (true) {
        char* cursor = data + data_length;
        char* line = fgets(cursor, alloc_length - data_length, stdin);

        if (!line) {
            break;
        }

        data_length += strlen(cursor);

        if (data_length < alloc_length - 1 || data[data_length - 1] == '\n') {
            break;
        }

        alloc_length <<= 1;

        data = realloc(data, alloc_length);

        if (!data) {
            data = '\0';

            break;
        }
    }

    if (data[data_length - 1] == '\n') {
        data[data_length - 1] = '\0';

        data = realloc(data, data_length);

        if (!data) {
            data = '\0';
        }
    } else {
        data = realloc(data, data_length + 1);

        if (!data) {
            data = '\0';
        } else {
            data[data_length] = '\0';
        }
    }

    return data;
}

char* ltrim(char* str) {
    if (!str) {
        return '\0';
    }

    if (!*str) {
        return str;
    }

    while (*str != '\0' && isspace(*str)) {
        str++;
    }

    return str;
}

char* rtrim(char* str) {
    if (!str) {
        return '\0';
    }

    if (!*str) {
        return str;
    }

    char* end = str + strlen(str) - 1;

    while (end >= str && isspace(*end)) {
        end--;
    }

    *(end + 1) = '\0';

    return str;
}

int parse_int(char* str) {
    char* endptr;
    int value = strtol(str, &endptr, 10);

    if (endptr == str || *endptr != '\0') {
        exit(EXIT_FAILURE);
    }

    return value;
}