function tanksColector(input) {
  let list = input.shift().split(", ");
  let numOfCom = +input.shift();

  const add = (tankName) => {
      if (list.includes(tankName)) {
          console.log(`Tank is already bought`);
      } else {
          console.log(`Tank successfully bought`);
          list.push(tankName);
      }
  }

  const remove = (tankName) => {
      if (list.includes(tankName)) {
          console.log(`Tank successfully sold`);
          let index = list.indexOf(tankName);
          list.splice(index, 1);
      } else {
          console.log(`Tank not found`);
      }
  }
  const removeAt = (index) => {
      index = Number(index);
      if (index >= 0 && index < list.length) {
          console.log(`Tank successfully sold`);
          list.splice(index, 1);
      } else {
          console.log(`Index out of range`);
      }
  }
  const insert = (index, tankName) => {
      index = Number(index);
      if (index >= 0 && index < list.length && list.includes(tankName)) {
          console.log(`Tank is already bought`);
      } else if (index >= 0 && index < list.length && !list.includes(tankName)) {
          console.log(`Tank successfully bought`);
          list.splice(index, 0, tankName);
      } else {
          console.log(`Index out of range`);
      }
  }
  for (let i = 0; i < numOfCom; i++) {
      let instructions = input[i].split(", ");
      let command = instructions[0];
      let el1 = instructions[1];
      let el2 = instructions[2];

      if (command === "Add") {
          add(el1);
      } else if (command === "Insert") {
          insert(el1, el2);
      } else if (command === "Remove") {
          remove(el1);
      } else if (command === "Remove At") {
          removeAt(el1);
      }
  }
  console.log(list.join(", "));
}
tanksColector([
    'T-34-85 Rudy, SU-100Y, STG',
    '3',
    'Add, King Tiger(C)',
    'Insert, 2, IS-2M',
    'Remove, T-34-85 Rudy'
  ])