enclosing a substring using unordered map

#pragma GCC optimize ("O3")
#pragma GCC target ("sse4")

#include <bits/stdc++.h>
using namespace std;

typedef long long ll;
typedef pair<int, int> pii;
typedef pair<string,int> psi;
typedef unordered_map<int,int> mii;
typedef unordered_map<long long,long long> mll;
typedef map<string,int> msi;
typedef unordered_map<char,int> mci;
typedef set<int> si;
typedef set<long long> sll;
typedef set<string> ss;
typedef set<char> sc;
typedef vector<int> vi;
typedef vector<string> vs;
typedef vector<char> vc;
typedef vector<ll> vll;
typedef vector<vector<int>> vvi;
typedef vector<vector<string>> vvs;
typedef vector<vector<ll>> vvll;

#define FOR(i, a, b) for (auto i=a; i<=(b); i++)
#define FORd(i,b,a) for (int i =b; i >= a; i--)
#define sz(x) (int)(x).size()
#define mp make_pair
#define pb push_back
#define f first
#define s second
#define ins insert

const int MOD = 1000000007;
//type functions here
bool check(mci m,mci b)
{
    for(auto x:m)
    {
       // cout<<x.f<<b[x.f]<<endl;
        if(b[x.f]<x.s) return false;

    }
    return true;
}


int main() {
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
    int tc=1;
    cin>>tc;
    FOR(w,1,tc)
    {
        string big="tt0ss00t",small="st";
        cin>>small>>big;
        mci m,b;

        for(auto x:small)  m[x]++;


        int i=0,j=0,sze=sz(big),count=INT_MAX;
        while(i<sze&&j<sze)
        {

            while(i<sze&&check(m,b)==false)
            {

                b[big[i]]++;
                i++;


            }

            while(j<sze&&check(m,b)==true)
            {

                int curr=(i-1)-j+1;
                if(b[big[j]]==1)  b.erase(big[j]);
                else              b[big[j]]--;

                j++;
                count=min(count,curr);
            }

        }
        if(count==INT_MAX) cout<<"-1"<<endl;
        else              cout<<count<<endl;

    }
    return 0;
}