function solve(params) {
  let Num = +params.shift();
  let Arr = [];
  let pattern = /^(?<users>[A-Za-z]{5,})@(?<domains>[a-z]{3,}\.(bg|com|org))$/
  for (let line of params) {
    let matched = pattern.exec(line);
    if (matched === null) {
      continue;
    }
    let nameUser = matched[1];
    let domainUser = matched[2];
    let indexOf = Arr.findIndex((object) => {
      return object.domainUser === domainUser;
    });
    if (indexOf < 0) {
      Arr.push({
        domainUser,
        nameUser: [nameUser],
        count: 1
      });
    } else if(!Arr[indexOf].nameUser.includes(nameUser)) {
      Arr[indexOf].nameUser.push(nameUser);
      Arr[indexOf].count++;
    }
  }
      Arr.sort(function (a, b) {
          if (a.count === b.count) {
              return a.domainUser.localeCompare(b.domainUser);
          } else {
              return b.count - a.count;
          }
      });
      Arr.forEach((line) => {
        console.log(`${line.domainUser}:`);
        line.nameUser.forEach((EachnameUser) => {
            console.log(`### ${EachnameUser}`);
        });
    });
}