func_code_string: #include<bits/stdc++.h>   using namespace std;      #define IOS ios::sync_with_stdio(0); cin.tie(0); cout.tie(0);   #define int long long   #define line cout<< [At  <<__LINE__<< ] <<endl;   #define size(x) ((int)x.size())      namespace Debug{     void __print(signed x){cout << x;}     void __print(long x){cout << x;}     void __print(long long x){cout << x;}     void __print(unsigned x){cout << x;}     void __print(unsigned long x){cout << x;}     void __print(unsigned long long x){cout << x;}     void __print(float x){cout << x;}     void __print(double x){cout << x;}     void __print(long double x){cout << x;}     void __print(char x){cout <<      << x <<     ;}     void __print(const char *x){cout <<     << x <<    ;}     void __print(const string &x){cout <<     << x <<    ;}     void __print(bool x){cout << (x ?  true  :  false );}     template<typename T, typename V> void __print(const pair<T, V> &x){cout <<  { ;__print(x.first);cout <<  , ;__print(x.second);cout <<  } ;}     template<typename T> void __print(const T &x){int f = 0;cout <<  { ;for (auto &i : x) cout << (f++ ?  ,  :   ), __print(i);cout <<  } ;}     void _print(){cout <<  ] <<endl;}     template <typename T, typename... V> void _print(T t, V... v){__print(t);if (sizeof...(v)) cout <<  ,  ;_print(v...);}          #define debug(x...) cout << Line: <<__LINE__<<   [  << #x <<  ] = [ ; _print(x);     #define deb(x...) cout << [  << #x <<  ] = [ ; _print(x);   }using namespace Debug;         const int mod = (int)1e9 + 7ll;      int dp[2000][2000][2], n;      int shoot(int plane, int k, int dir){    if(plane > n || plane < 1 || k == 1)     return 1l;        if(dp[plane][k][dir] != -1)      return dp[plane][k][dir];        int res = 0l;        if(dir == 0){      res = shoot(plane + 1, k, dir);      res += shoot(plane - 1, k - 1, 1 - dir);     }     else{      res = shoot(plane - 1, k, dir);      res += shoot(plane + 1, k - 1, 1 - dir);     }        res %= mod;     return dp[plane][k][dir] = res;   }      void process(){    int k;    cin >> n >> k;    cout << shoot(1, k, 0) <<   n ;   }      signed main() {    IOS;    int t = 1;    cin >> t;    while(t--){     memset(dp, -1, sizeof(dp));     process();    }    return 0;   }