doctorsOffice.js

const queue = [];

const append = (patientsName) => {
  queue.push(patientsName);
  console.log("OK");
};

const insert = (position, patientsName) => {
  if (position >= 0 && position <= queue.length) {
    queue.splice(position, 0, patientsName);
    console.log("OK");
  } else {
    console.log("Error");
  }
};

const find = (patientsName) => {
  const count = queue.filter((person) => person === patientsName).length;
  console.log(count);
};

const examine = (count) => {
  if (count <= queue.length) {
    const examinedPeople = queue.splice(0, count);
    console.log(examinedPeople.join(" "));
  } else {
    console.log("Error");
  }
};

for (let i = 0; ; i++) {
    const command = gets();

    if (command === "End") {
      break;
    }

    const [cmd, ...params] = command.split(" ");

    if (cmd === "Append") {
      append(params[0]);
    } else if (cmd === "Insert") {
      insert(Number(params[0]), params[1]);
    } else if (cmd === "Find") {
      find(params[0]);
    } else if (cmd === "Examine") {
      examine(Number(params[0]));
    }
  }