function solve(input) {
  let listArr = input.shift().split(' ');

  while (input.length > 0) {
    let commands = input.shift().split(' ');
    let singleCommand = commands[0];

    switch (singleCommand) {
      case 'Remove':
        let index = +commands[1];
        if (index < listArr.length) {
          listArr.splice(index, 1);
        }
        break;

      case 'Add':
        let name = commands[1];
        let index2 = +commands[2];

        if (listArr.indexOf(name) === -1) {
          listArr.push(name);
        } else if (index2 < listArr.length || index2 === 0) {
          listArr.splice(index2, 0, name);
        }
        break;

      case 'Export':
        let startIndex = +commands[1];
        let count = +commands[2];

        if (startIndex < listArr.length) {
          console.log(`${listArr.slice(startIndex, startIndex + count).join(' ')}`);
        }
        break;

      case 'Print':
        let command = commands[1];

        if (command === 'Reversed') {
          listArr.reverse();
        }
        console.log(`Contacts: ${listArr.join(' ')}`);
        return;
    }
  }
}