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

#define CPP_STR(x) CPP_STR_I(x)
#define CPP_CAT(x, y) CPP_CAT_I(x, y)
#define CPP_STR_I(args...) #args
#define CPP_CAT_I(x, y) x##y

#define ASSERT(expr...) assert((expr))

using i8 = int8_t;
using u8 = uint8_t;
using i16 = int16_t;
using u16 = uint16_t;
using i32 = int32_t;
using u32 = uint32_t;
using i64 = int64_t;
using u64 = uint64_t;

using f32 = float;
using f64 = double;
// }}}

constexpr i64 INF = 1'010'000'000'000'000'017LL;

constexpr i64 MOD = 998244353LL;

constexpr f64 EPS = 1e-12;

constexpr f64 PI = 3.14159265358979323846;

#define M5 100007
#define M9 1000000000

#define F first
#define S second

// util {{{
#define FOR(i, start, end) for (i64 i = (start), CPP_CAT(i, xxxx_end) = (end); i < CPP_CAT(i, xxxx_end); ++i)
#define REP(i, n) FOR(i, 0, n)

#define all(x) (x).begin(), (x).end()
#define ll long long int
#define VI vector<ll>
#define VVI vector<VI>

#define ISD true
#define debug(x) \
    if (ISD)     \
    cout << #x << ": " << x << endl

template <typename T, typename U, typename Comp = less<>>
bool chmax(T &xmax, const U &x, Comp comp = {})
{
    if (comp(xmax, x))
    {
        xmax = x;
        return true;
    }
    return false;
}

template <typename T, typename U, typename Comp = less<>>
bool chmin(T &xmin, const U &x, Comp comp = {})
{
    if (comp(x, xmin))
    {
        xmin = x;
        return true;
    }
    return false;
}

set<VI> C;
map<VI, ll> M;

ll solve()
{
    string NS;
    cin >> NS;
    VI v(10);
    for (auto s0 : NS)
    {
        v[s0 - '0']++;
    }

    ll c0 = v[0];
    REP(i, c0 + 1)
    {
        v[0] = i;
        if (C.count(v))
        {
            return M[v];
        }
    }

    return -1;
}

int main()
{
    FOR(i, 1, 1e5)
    {
        ll l = i * i;
        string s = to_string(l);
        VI v(10);
        for (auto s0 : s)
        {
            v[s0 - '0']++;
        }
        C.insert(v);
        M[v] = l;
    }

    ll T;
    cin >> T;
    VI ans(T);
    REP(t, T)
    {
        ans[t] = solve();
    }
    for (const auto &a : ans)
    {
        cout << a << endl;
    }
}