func_code_string: /**    * Author: lukasdeimos   */      #include<bits/stdc++.h>      #define endl   n       #define ff first   #define ss second      using ll = long long;   using namespace std;      void solve() {    int n,k;    cin >> n >> k;       cout << (n-k+k/2) << endl;    for(int i = k+1; i <= n; i++) cout << i <<    ;    for(int i = (k+1)/2; i < k; i++) cout << i <<    ;    cout << endl;      }      int main() {    ios::sync_with_stdio(false);    cin.tie(0);    cout.tie(0);        ll tt;    tt = 1;     cin >> tt;    for(auto test_case = 1; test_case <= tt; test_case++) {    // cout <<  Case   << test_case <<  :  ;     solve();    }           return 0;   }   