#include <bits/stdc++.h>
#define mp make_pair
#define pb push_back
#define mt make_tuple
#define f first
#define s second
using namespace std;
typedef long long ll;
typedef unsigned long long ull;
typedef pair<int, int> pii;
typedef pair<ll, ll> pll;
typedef tuple<int, int, int> tiii;
typedef pair<double,double> pdd;
const ll mod = 1e9+7;
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