Hustlingbeast_7

#include <bits/stdc++.h>
#include <algorithm>
#define lli long long int
#define li long int
#define vi vector<int>
#define mod 1000000007
#define ld long double
#define F first
#define S second
#define PB push_back
#define MP make_pair
#define REP(i, a, b) for (int i = a; i < b; i++)
using namespace std;

int main()
{
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);

    lli t;
    cin >> t;

    while (t--)
    {
        string s;
        cin >> s;
        lli p = s.size();
        vi vec;
        lli ct = 0;
        for (lli i = 0; i < s.size(); i++)
        {
            if (s[i] != s[0] && s[i] != s[p - 1])
            {
                ct++;
            }
            else
            {
                ct = 0;
            }
            vec.PB(ct);
        }
        lli h = *max_element(vec.begin(), vec.end());
        if (h == 0)
        {
            cout << -1 << endl;
        }
        else
            cout << h << endl;
    }
    return 0;
}